International Journal Papers

2021

  1. H. Terada, S. Ohya, and M. Tanaka, Bias-dependent two-phase anisotropy in magnetoresistance of a GaMnAs-based magnetic tunnel junction, Appl. Phys. Express 15, 033001 (2022).
  2. S. Arai, S. Kaneta-Takada, L. D. Anh, M. Tanaka, and S. Ohya, Theoretical analysis of the inverse Edelstein effect at the LaAlO3 / SrTiO3 interface with an effective tight-binding model: Important role of the second dxy subband, Appl. Phys. Express 15, 013005 (2022).
  3. Tomoki Hotta, Kengo Takase, Kosuke Takiguchi, Karumuri Siharsha, Le Duc Anh, and Masaaki Tanaka, Growth and characterization of quaternary-alloy ferromagnetic semiconductor (In,Ga,Fe)Sb, AIP Advances, 12, 015307 (2022).
  4. Nguyen Thanh Tu, Tomohiro Otsuka, Yuto Arakawa, Le Duc Anh, Masaaki Tanaka, and Pham Num Hai, Spin transport in fully ferromagnetic p–n junctions, J. Appl. Phys. 131, 013902 (2022).

2021

  1. R. Suzuki, Y. Tadano, M. Tanaka, and S. Ohya, Unconventional bias dependence of tunnel magnetoresistance induced by the Coulomb blockade effect, AIP Advances 11, 125029 (2021).
  2. Miao Jiang, Eisuke Matsushita, Yota Takamura, Le Duc Anh, Shigeki Nakagawa, Shinobu Ohya, and Masaaki Tanaka, Spin-orbit toruque magnetization switching in a perpendicularly magnetized full Heusler alloy Co2FeSi, AIP. Advances. 11, 115014 (2021).
  3. Le Duc Anh, Kengo Takase, Takahiro Chiba, Yohei Kota, Kosuke Takiguchi, and Masaaki Tanaka
    “Elemental Topological Dirac Semimetal α-Sn with High Quantum Mobility” Advanced Materials DOI:10.1002/adma.202104645 (2021).
  4. Le Duc Anh, Taiki Hayakawa, Yuji Nakagawa, Hikari Shinya, Tetsuya Fukushima, Hiroshi Katayama-Yoshida, Yoshihiro Iwasa, and Masaaki Tanaka, “Ferromagnetism and giant magnetoresistance in zinc-blende FeAs monolayers embedded in semiconductor structures”, Nature Communications 12, 4201 (2021).
  5. Karumuri Sriharsha, Le Duc Anh, Masaaki Tanaka, Ferromagnetic Fe-doped InAs quantum dots with high Curie temperature, Appl. Phys. Express (2021, accepted).
  6. Masaki Kobayashi, Le Duc Anh, Masahiro Suzuki, Shingo Kaneta-Takada, Yukiharu Takeda, Shin-ichi, Fujimori, Masaaki Tanaka, Shinobu Ohya, and Atsushi Fujimori, “Alternation of Magnetic Anisotropy Accompanied by Metal-Insulator Transition in Strained Ultrathin Manganite Heterostructures”, Phys. Rev. Applied 15, 064019 (2021).
  7. M. Kobayashi, Le Duc Anh, J. Minár, W. Khan, S. Borek, P. N. Hai, Y. Harada, T. Schmitt, M. Oshima, A. Fujimori, M. Tanaka, and V. N. Strocov, “Minority-Spin Impurity Band in n-Type (In,Fe)As: A Materials Perspective for Ferromagnetic Semiconductors”, Phys. Rev. B 103, 115111 (2021).
  8. Yuki K. Wakabayashi, Shingo Kaneta-Takada, Yoshiharu Krockenberger, Shinobu Ohya, Masaaki Tanaka, Yoshitaka Taniyasu, and Hideki Yamamoto, Structural and transport properties of highly Ru-deficient SrRu0.7O3 thin films prepared by molecular beam epitaxy: Comparison with stoichiometric SrRuO3 films, AIP. Advances. 11, 035226 (2021).
  9. Shingo Kaneta-Takada, Yuki K. Wakabayashi, Yoshiharu Krockenberger, Shinobu Ohya, Masaaki Tanaka, Yoshitaka Taniyasu, and Hideki Yamamoto, Thickness-dependent quantum transport of Weyl fermions in ultra-high-quality SrRuO3 films, Appl. Phys. Lett. 118, 092408 (2021).

2020

  1. Kosuke Takiguchi, Yuki K. Wakabayashi, Hiroshi Irie, Yoshiharu Krockenberger, Takuma Otsuka, Hiroshi Sawada, Sergey A. Nikolaev, Hena Das, Masaaki Tanaka, Yoshitaka Taniyasu, and Hideki Yamamoto, Quantum transport evidence of Weyl fermions in an epitaxial ferromagnetic oxide, Nat. Commun. 11 4969 (2020)
  2. K. Sriharsha, L. D. Anh, Y. Shimada, T. Takahashi, M. Tanaka, Growth and characterization of ferromagnetic Fe-doped GaSb quantum dots with high Curie temperature, APL Materials (2020) (in press)
  3. Shingo Kaneta-Kanada, Michihiro Yamada, Shoichi Sato, Shoma Arai, Le Duc Anh, Kohei Hamaya and Shinobu Ohya, Enhancement of the spin Hall angle by interdiffusion of atoms in Co2FeAl0.5Si0.5/n-Ge heterostructures, Phys. Rev. Applied  14, 024096 (2020).
  4. K. Takase, L. D. Anh, K. Takiguchi, M. Tanaka, Current-in-plane spin-valve magnetoresistance in ferromagnetic semiconductor (Ga,Fe)Sb heterostructures with high Curie temperature Appl. Phys. Lett. 117, 092402 (2020).
  5. R. Suzuki, Y. Tadano, M. Tanaka, and S. Ohya, Large tunnel magnetoresistance in a fully epitaxial double-barrier magnetic tunnel junction of Fe/MgO/Fe/γAl2O3/Nb-doped SrTiO3, AIP Adv. 10, 085115 (2020).
  6. Le Duc Anh, Taiki Hayakawa, Kohei Okamoto, Nguyen Thanh Tu, Masaaki Tanaka, Transport and magnetic properties of co-doped ferromagnetic semiconductor (In,Fe,Mn)As, Appl. Phys. Express 13, 083005 (2020).
  7. T. Takeda, M. Suzuki, Le Duc Anh , N. T. Tu, T. Schmitt, S. Yoshida, M. Sakano, K. Ishizaka, Y. Takeda, S. Fujimori, M. Seki, H. Tabata, A. Fujimori, V. N. Strocov, M. Tanaka, and M. Kobayashi, Hybridization between the ligand p band and Fe-3d orbitals in the p-type ferromagnetic semiconductor (Ga,Fe)Sb, Phys. Rev. B 101, 155142 (2020).
  8. Le Duc Anh, Shingo Kaneta, Masashi Tokunaga, Munetoshi Seki, Hitoshi Tabata, Masaaki Tanaka, Shinobu Ohya, High‐Mobility 2D Hole Gas at a SrTiO3 Interface. Adv. Mater. 7, 1906003 (2020). (See press release: UTokyo, Nikkei shimbun).
  9. S. Goel, L. D. Anh, S. Ohya, and M. Tanaka, Temperature dependence of magnetic anisotropy in heavily Fe-doped ferromagnetic semiconductor (Ga,Fe)Sb, J. Appl. Phys. 127, 023904 (2020)
  10. S. Ohya, D. Araki, L. D. Anh, S. Kaneta, M. Seki, H. Tabata, and M. Tanaka, Efficient intrinsic spin-to-charge current conversion in an all-epitaxial single-crystal perovskite-oxide heterostructure of La0.67Sr0.33MnO3/LaAlO3/SrTiO3, Phys. Rev. Res2, 012014 (R) (2020).
  11. S. Sakamoto, Y. Nonaka, K. Ikeda, Zh. Chi, Y. Wan, M. Suzuki, A. Fujimori, L. D. Anh, P. N. Hai, Y. Takeda, Y. Saitoh, M. Kobayashi, M. Tanaka, Y. K. Wakabayashi, and H. Yamagami, Magnetization process of the insulating ferromagnetic semiconductor (Al,Fe)Sb, Phys. Rev. B 101, 075204 (2020).
  12. Koki Chonan, Nguyen Huynh Duy Khang, Masaaki Tanaka, and Pham Nam Hai, “Large magnetoresistance and spin-dependent output voltage in a lateral MnGa/GaAs/MnGa spin-valve device”, Jpn. J. Appl. Phys. 59, pp.SGGI08/1-4 (2020). Doi: 10.7567/1347-4065/ab5b31

2019

  1. Le Duc Anh, Takashi Yamashita, Hiroki Yamasaki, Daisei Araki, Munetoshi Seki, Hitoshi Tabata, Masaaki Tanaka, and Shinobu Ohya, Ultralow-Power Orbital-Controlled Magnetization Switching Using a Ferromagnetic Oxide Interface. Phys. Rev. Applied. 12, 041001 (2019). DOI: https://doi.org/10.1103/PhysRevApplied.12.041001 Press Release : Nikkei Shinbun
  2. Kosuke Takiguchi, Le Duc Anh, Takahiro Chiba, Tomohiro Koyama, Daichi Chiba, Masaaki Tanaka, Giant gate-controlled proximity magnetoresistance in semiconductor-based ferromagnetic–non-magnetic bilayers. Nature Physics  15, 1134 (2019). Press Release : UTokyo , Nikkei Shinbun, OPTRONICS ONLINE, EE Times Japan 
  3. Shobhit Goel, Le Duc Anh, Nguyen Thanh Tu, Shinobu Ohya, and Masaaki Tanaka, In-plane to perpendicular magnetic anisotropy switching in heavily-Fe-doped ferromagnetic semiconductor (Ga,Fe)Sb with high Curie temperature. Phys. Rev. Materials 3, 084417 (2019). DOI: 10.1103/PhysRevMaterials.3.084417.
  4. Shoya Sakamoto, Nguyen Thanh Tu, Yukiharu Takeda, Shin-ichi Fujimori, Pham Nam Hai, Le Duc Anh, Yuki K. Wakabayashi, Goro Shibata, Masafumi Horio, Keisuke Ikeda, Yuji Saitoh, Hiroshi Yamagami, Masaaki Tanaka, and Atsushi Fujimori. “Electronic structure of the high-TC ferromagnetic semiconductor (Ga,Fe)Sb: X-ray magnetic circular dichroism and resonance photoemission spectroscopy studies”. Phys. Rev. B 100, 035204 (2019).
  5. Miao Jiang, Hirokatsu Asahara, Shoichi Sato, Toshiki Kanaki, Hiroki Yamasaki, Shinobu Ohya and Masaaki Tanaka “Efficient full spin–orbit torque switching in a single layer of a perpendicularly magnetized single-crystalline ferromagnet” Nature Communications 10, 2590 (2019). https://doi.org/10.1038/s41467-019-10553-x
  6. Shingo Kaneta, Le Duc Anh, Karumuri Sriharsha, and Masaaki Tanaka “Observation of quantum size effect at the conduction band bottom of n-type ferromagnetic semiconductor (In,Fe)As thin films” Appl. Phys. Express 12 pp. 073001/1-4 (2019). https://iopscience.iop.org/article/10.7567/1882-0786/ab25c8/meta
  7. Shobhit Goel, Le Duc Anh, Shinobu Ohya, and Masaaki Tanaka
    “Ferromagnetic resonance and control of magnetic anisotropy by epitaxial strain in ferromagnetic semiconductor (Ga0.8,Fe0.2)Sb at room temperature” Phys. Rev. B 99, pp.014431/1-7 (2019). DOI: 10.1103/PhysRevB.99.014431 https://doi.org/10.1103/PhysRevB.99.014431
  8. Toshiki Kanaki, Shin Matsumoto, Sai Krishna Narayananellore, Hidekazu Saito, Yoshihiro Iwasa, Masaaki Tanaka, and Shinobu Ohya “Room-temperature operation of a vertical spin metal-oxide-semiconductor field-effect transistor-type device using an oxide semiconductor” Appl. Phys. Express 12, pp.23009/1-4 (2019). DOI:10.7567/1882-0786/aafed6
  9. Kento Nishijima, Nguyen Thanh Tu, Masaaki Tanaka, and Pham Nam Hai “Fe delta-doped (In,Fe)Sb ferromagnetic semiconductor thin films for magnetic-field sensors with ultrahigh Hall sensitivity” J. Crystal Growth 511, pp.127–131 (2019). DOI: 10.1016/j.jcrysgro.2019.01.030 https://doi.org/10.1016/j.jcrysgro.2019.01.030
  10. Tomoaki Ishii, Hiromichi Yamakawa, Toshiki Kanaki, Tatsuya Miyamoto, Noriaki Kida, Hiroshi Okamoto, Masaaki Tanaka, and Shinobu Ohya “Large terahertz magnetization response in ferromagnetic nanoparticles” Appl. Phys. Lett. 114, pp.062402/1-4 (2019). DOI: 10.1063/1.5088227 https://doi.org/10.1063/1.5088227
    Featured Article in Applied Physics Letters.
  11. Karumuri Sriharsha, Le Duc Anh, Nguyen Thanh Tu, Shobhit Goel, and Masaaki Tanaka “Magneto-optical spectra and the presence of an impurity band in p-type ferromagnetic semiconductor (Ga,Fe)Sb with high Curie temperature” APL Materials 7, pp.021105/1-6 (2019). DOI: 10.1063/1.5083175 https://doi.org/10.1063/1.5083175
  12. Ryosho Nakane, Mitsuki Ichihara, Shoichi Sato, and Masaaki Tanaka,
    “Nearly ideal spin tunneling efficiency in Fe/Mg/MgO/SiOx/n+-Si(001) junctions” Phys. Rev. Materials 3, pp.024411/1-9 (2019). DOI: 10.1103/PhysRevMaterials.3.024411 https://doi.org/10.1103/PhysRevMaterials.3.024411
  13. Taketomo Nakamura, Le Duc Anh, Yoshiaki Hashimoto, Shinobu Ohya, Masaaki Tanaka, and Shingo Katsumoto “Spin triplet superconductive proximity effect in a ferromagnetic semiconductor”
    Phys. Rev. Lett. 122, pp.107001/1-6 (2019). DOI: 10.1103/PhysRevLett.122.107001 https://doi.org/10.1103/PhysRevLett.122.107001
  14. Shoichi Sato, Mitsuki Ichihara, Masaaki Tanaka, and Ryosho Nakane “Electron spin and momentum lifetimes in two-dimensional Si accumulation channels: Demonstration of Schottky-barrier spin metal-oxide-semiconductor field-effect transistors at room temperature” Phys. Rev. B 99, pp.165301/1-9 (2019). DOI: 10.1103/PhysRevB.99.165301 https://link.aps.org/doi/10.1103/PhysRevB.99.165301
  15. Hiep Duong Dinh, Masaaki Tanaka, and Hai Nam Pham,
    “Lateral silicon spin-valve devices with large spin-dependent magnetoresistance and output voltage” Advances in Natural Sciences: Nanoscience and Nanotechnology 10, pp.025001/1-8 (2019). DOI: 10.1088/2043-6254/ab11df

2018

  1. Hirokatsu Asahara, Toshiki Kanaki, Shinobu Ohya, and Masaaki Tanaka “Large spin-valve effect in a ferromagnetic-semiconductor GaMnAs-based lateral spin-valve device” Appl. Phys. Express 11 pp.033003/1-4 (2018). Doi: 10.7567/APEX.11.033003 https://doi.org/10.7567/APEX.11.033003
  2. Le Duc Anh, Pham Nam Hai, and Masaaki Tanaka “Electrical tuning of the band alignment and magnetoconductance in an n type ferromagnetic semiconductor (In,Fe)As-based spin-Esaki diode” Appl. Phys. Lett. 112, pp.102402/1-4 (2018). Doi: 10.1063/1.5010020
    https://doi.org/10.1063/1.5010020 Featured Article in Applied Physics Letters.
  3. Hiroshi Terada, Shinobu Ohya, and Masaaki Tanaka “Intrinsic transmission magnetic circular dichroism spectra of GaMnAs” AIP Advances 8, pp.035009/1-7 (2018). Doi: 10.1063/1.5020725 https://doi.org/10.1063/1.5020725
  4. Nguyen Thanh Tu, Pham Nam Hai, Le Duc Anh, and Masaaki Tanaka “Electrical control of ferromagnetism in the n-type ferromagnetic semiconductor (In,Fe)Sb with high Curie temperature” Appl. Phys. Lett. 112, pp.122409/1-5 (2018). Doi:10.1063/1.5022828 https://doi.org/10.1063/1.5022828
  5. Ryota Suzuki, Yuki K. Wakabayashi, Kohei Okamoto, Masaaki Tanaka, and Shinobu Ohya “Quantum size effect in a Fe quantum well detected by resonant tunneling carriers injected from a p-type Ge semiconductor electrode” Appl. Phys. Lett. 112, pp.152402/1-5 (2018).
    DOI: 10.1063/1.5020355 https://doi.org/10.1063/1.5020355
  6. Taketomo Nakamura, Le Duc Anh, Yoshiaki Hashimoto, Yu Iwasaki, Shinobu Ohya, Masaaki Tanaka, and Shingo Katsumoto “Proximity-Induced Superconductivity in a Ferromagnetic Semiconductor (In,Fe)As” IOP Conf. Series: Journal of Physics: Conf. Series 969, pp.012036/1-5 (2018). Doi :10.1088/1742-6596/969/1/012036
  7. Tomoaki Ishii, Hiromichi Yamakawa, Toshiki Kanaki, Tatsuya Miyamoto, Noriaki Kida, Hiroshi Okamoto, Masaaki Tanaka, and Shinobu Ohya, “Ultrafast magnetization modulation induced by the electric field component of a terahertz pulse in a ferromagnetic-semiconductor thin film” Scientific Reports 8, 6901/1-6 (2018). DOI:10.1038/s41598-018-25266-2 https://www.nature.com/articles/s41598-018-25266-2
  8. Ryosho Nakane, Takato Hada, Shoichi Sato, and Masaaki Tanaka, “Spin transport and spin accumulation signals in Si studied in tunnel junctions with a Fe/Mg ferromagnetic multilayer and an amorphous SiOxNy tunnel barrier” Appl. Phys. Lett. 112, pp.182404/1-4 (2018).
    Doi: 10.1063/1.5004494
  9. Cong Tinh Bui, Christina A. C. Garcia, Nguyen Thanh Tu, Masaaki Tanaka, and Pham Nam Hai “Planar Nernst Effect and Mott Relation in (In,Fe)Sb Ferromagnetic Semiconductor” J. Appl. Phys. 123, pp.175102/1-7 (2018). Doi: 10.1063/1.5026452 Editors Pick and Featured Article in Journal of Applied Physics.
  10. Toshiki Kanaki, Hiroki Yamasaki, Tomohiro Koyama, Daichi Chiba, Shinobu Ohya, and Masaaki Tanaka “Large current modulation and tunneling magnetoresistance change by a side-gate electric field in a GaMnAs-based vertical spin metal-oxide-semiconductor field-effect transistor” Scientific Reports 8, pp.7195/1-7 (2018). DOI:10.1038/s41598-018-24958-z
  11. Nguyen Thanh Tu, Pham Nam Hai, Le Duc Anh, and Masaaki Tanaka “High-temperature ferromagnetism in a new n–type Fe-doped ferromagnetic semiconductor (In,Fe)Sb” Applied Physics Express 11, pp.063005/1-4 (2018). DOI: 10.7567/APEX.11.063005 https://doi.org/10.7567/APEX.11.063005 arXiv: 1706.00735 http://arxiv.org/abs/1706.00735
  12. Toshiki Kanaki, Hiroki Yamasaki, Hiroshi Terada, Yoshihiro Iwasa, Shinobu Ohya, and Masaaki Tanaka “Improved performance of a GaMnAs-based vertical spin electric double-layer transistor” Jpn. J. Appl. Phys. (Rapid Communications) 57, pp.090301/1-5 (2018). DOI: 10.7567/JJAP.57.090301 http://iopscience.iop.org/article/10.7567/JJAP.57.090301/meta
  13. Yoshisuke Ban,Yuki K. Wakabayashi,Ryosho Nakane,and Masaaki Tanaka “Impurity band conduction in group-IV ferromagnetic semiconductor GeFe with nanoscale fluctuation in Fe concentration” J. Appl. Phys. 124, pp.113902/1-11 (2018). DOI: 10.1063/1.5022543 https://doi.org/10.1063/1.5022543 arXiv:1706.04445
    https://arxiv.org/abs/1706.04445
  14. Yuki K. Wakabayashi, Yosuke Nonaka, Yukiharu Takeda, Shoya Sakamoto, Keisuke Ikeda, Zhendong Chi, Goro Shibata, Arata Tanaka, Yuji Saitoh, Hiroshi Yamagami, Masaaki Tanaka, Atsushi Fujimori, and Ryosho Nakane “Cation distribution and magnetic properties in ultrathin (Ni1-xCox)Fe2O4 (x = 0 – 1) layers on Si(111) studied by soft X-ray magnetic circular dichroism” Phys. Rev. Materials 2, pp.104416/1-12 (2018). DOI: 10.1103/PhysRevMaterials.2.104416
    arXiv: 1808.02624 https://arxiv.org/abs/1808.02624

2017

  1. Yuki K. Wakabayashi, Ryota Akiyama, Yukiharu Takeda, Masafumi Horio, Goro Shibata, Shoya Sakamoto, Yoshisuke Ban, Yuji Saitoh, Hiroshi Yamagami, Atsushi Fujimori, Masaaki Tanaka, and Shinobu Ohya, “Origin of the large positive magnetoresistance in Ge1-xMnx granular thin films” Phys. Rev. B.95, pp.014417/1-6 (2017). DOI: 10.1103/PhysRevB.95.014417 arXiv:1606.04263 http://arxiv.org/abs/1606.04263
  2. S. Sakamoto, Y. K. Wakabayashi, Y. Takeda, S.-i. Fujimori, H. Suzuki, Y. Ban, H. Yamagami, M. Tanaka, S. Ohya, and A. Fujimori “Origin of robust nanoscale ferromagnetism in Fe-doped Ge revealed by angle-resolved photoemission spectroscopy and first-principles calculation”
    Phys. Rev. B.95, pp.075203/1-5 (2017). DOI: 10.1103/PhysRevB.95.075203 arXiv:1605.05275 http://arxiv.org/abs/1605.05275
  3. Iriya Muneta, Toshiki Kanaki, Shinobu Ohya, and Masaaki Tanaka
    “Artificial control of the bias-voltage dependence of tunnelling-anisotropic magnetoresistance using quantization in a single-crystal ferromagnet” Nature Communications 8, 15387/1-8 (2017).
    https://www.nature.com/articles/ncomms15387 arXiv:1703.04294
    https://arxiv.org/abs/1703.04294
  4. Tatsuya Matou, Kento Takeshima, Le Anh, Munetoshi Seki, Hitoshi Tabata, Masaaki Tanaka, and Shinobu Ohya, “Reduction of the magnetic dead layer and observation of tunneling magnetoresistance in La0.67Sr0.33MnO3-based heterostructures with a LaMnO3 layer,”
    Appl. Phys. Lett. 110, pp.212406/1-4 (2017). Doi: 10.1063/1.4984297
  5. Hiroshi Terada, Shinobu Ohya, Le Duc Anh, Yoshihiro Iwasa, and Masaaki Tanaka, “Magnetic anisotropy control by applying an electric field to the side surface of ferromagnetic films” Scientific Reports 7, pp.5618/1-7 (2017). DOI: 10.1038/s41598-017-05799-8
  6. Le Duc Anh, Noboru Okamoto, Munetoshi Seki, Hiroshi Tabata, Masaaki Tanaka, and Shinobu Ohya, “Hidden peculiar magnetic anisotropy at the interface in a ferromagnetic perovskite-oxide heterostructure”, Scientific Reports 7, pp.8715/1-7 (2017).
    DOI:10.1038/s41598-017-09125-0
  7. Yuki K. Wakabayashi, Yosuke Nonaka, Yukiharu Takeda, Shoya Sakamoto, Keisuke Ikeda, Zhendong Chi, Goro Shibata, Arata Tanaka, Yuji Saitoh, Hiroshi Yamagami, Masaaki Tanaka, Atsushi Fujimori, Ryosho Nakane “Electronic structure and magnetic properties of magnetically dead layers in epitaxial CoFe2O4/Al2O3/Si(111) films studied by X-ray magnetic circular dichroism” Phys. Rev. B 96, pp.104410/1-11 (2017). DOI: 10.1103/PhysRevB.96.104410
    arXiv:1704.01712 https://arxiv.org/abs/1704.01712
  8. Shinobu Ohya, Akiyori Yamamoto, Tomonari Yamaguchi, Ryo Ishikawa, Ryota Akiyama, Le Duc Anh, Shobhit Goel, Yuki K. Wakabayashi, Shinji Kuroda, and Masaaki Tanaka “Observation of the inverse spin Hall effect in the topological crystalline insulator SnTe using spin pumping” Phys. Rev. B 96, pp.094424/1-5 (2017). DOI: 10.1103/PhysRevB.96.094424
  9. Kosuke Takiguchi, Yuki K. Wakabayashi, Kohei Okamoto, Masaaki Tanaka, and Shinobu Ohya “Fe concentration dependence of tunneling magnetoresistance in magnetic tunnel junctions using group-IV ferromagnetic semiconductor GeFe” AIP Advances 7, pp.105202/1-7 (2017). Doi: 10.1063/1.5006926
  10. Duong Dinh Hiep, Masaaki Tanaka, and Pham Nam Hai “Inverse spin-valve effect in nanoscale Si-based spin-valve devices”
    J. Appl. Phys. 122, pp.223904/1-7 (2017). DOI: 10.1063/1.4994881
    https://doi.org/10.1063/1.4994881
  11. Shoichi Sato, Ryosho Nakane, Takato Hada, and Masaaki Tanaka
    “Spin injection into Si in three-terminal vertical and four-terminal lateral devices with Fe/Mg/MgO/Si tunnel junctions having an ultrathin Mg insertion layer” Phys. Rev. B 96, pp.235204/1-10 (2017).
    DOI: 10.1103/PhysRevB.96.235204 https://doi.org/10.1103/PhysRevB.96.235204 arXiv: 1704.06582 https://arxiv.org/abs/1704.06582

2016

  1. S. Sakamoto, L. D. Anh, P. N. Hai, G. Shibata, Y. Takeda, M. Kobayashi, Y. Takahashi, T. Koide, M. Tanaka, and A. Fujimori, “Magnetization Process of the n-type Ferromagnetic Semiconductor (In,Fe)As:Be Studied by X-ray Magnetic Circular Dichroism”, Phys. Rev. B93, pp.035203/1-6 (2016). DOI: 10.1103/PhysRevB.93.035203
  2. Pham Nam Hai, Daiki Maruo, Le Duc Anh, and Masaaki Tanaka, “Continuous reddish-yellow visible-light emission at room temperature in manganese-doped silicon light-emitting diodes”, Phys. Rev. B93, pp.094423/1-6 (2016).
    DOI: 10.1103/PhysRevB.93.094423
  3. Iriya Muneta, Shinobu Ohya, Hiroshi Terada and Masaaki Tanaka, “Sudden restoration of the band ordering associated with the ferromagnetic phase transition in a semiconductor”, Nature Communications 7, 12013 (2016). Doi: 10.1038/ncomms12013
  4. Yuki K. Wakabayashi, Shoya Sakamoto, Yukiharu Takeda, Keisuke Ishigami, Yukio Takahashi, Yuji Saitoh, Hiroshi Yamagami, Atsushi Fujimori, Masaaki Tanaka, and Shinobu Ohya, “Room temperature local ferromagnetism and nanoscale domain growth in the ferromagnetic semiconductor GeFe”, Scientific Reports 6, pp.23295/1-9 (2016). Doi: 10.1038/srep23295.
    arXiv 1502.00118 (January 31, 2015)
  5. Nguyen Thanh Tu, Pham Nam Hai, Le Duc Anh, and Masaaki Tanaka, “High-temperature ferromagnetism in heavily Fe-doped  ferromagnetic semiconductor (Ga,Fe)Sb”, Appl. Phys. Lett. 108, pp.192401/1-4 (2016).
    DOI: 10.1063/1.4948692
  6. Tomoaki Ishii, Tadashi Kawazoe, Yusuke Hashimoto, Hiroshi Terada, Iriya Muneta, Motoichi Ohtsu, Masaaki Tanaka, and Shinobu Ohya, “Electronic structure near the Fermi level in the ferromagnetic semiconductor GaMnAs studied by ultrafast time-resolved light-induced reflectivity measurements”, Phys. Rev. B 93, pp.241303(R)/1-4 (2016).
    DOI: 10.1103/PhysRevB.00.001300
  7. L. D. Anh, P. N. Hai, M. Tanaka, “Observation of spontaneous spin-splitting in the band structure of an n-type zinc-blende ferromagnetic semiconductor”. Nature Communications 7, 13810(2016).

2015

  1. Atsushi Ishikawa, Tomohiro Amemiya, Yuya Shoji, Pham Nam Hai, Masaaki Tanaka, Tetsuya Mizumoto, Shigehisa Arai, Takuo Tanaka, “Optical and Magnetic Microstructures in YIG Ferrite Fabricated by Femtosecond Laser”, Journal of Laser Micro/Nanoengineering, Vol. 10, No. 1, pp. 48-52, (Feb. 2015).
  2. Ryosho Nakane, Satoshi Sugahara, and Masaaki Tanaka,”Structural and magnetic properties of ferromagnetic Fe1-xSix (0.18<x<0.33) films formed by rapid thermal annealing on silicon-on-insulator substrates” J. Appl. Phys. 117, pp.133906/1-10 (2015). Doi: 10.1063/1.4915335.
  3. Hiroshi Terada, Shinobu Ohya, and Masaaki Tanaka, “Intrinsic magneto-optical spectra of GaMnAs”. Appl. Phys. Lett. 106, pp.222406/1-4 (2015). Doi: 10.1063/1.4922218
  4. Shoichi Sato, Ryosho Nakane, and Masaaki Tanaka, “Origin of the broad three-terminal Hanle signals in Fe/SiO2/Si tunnel junctions”, Appl. Phys. Lett. 107, pp.032407/1-5 (2015). Doi: 10.1063/1.4926969
  5. Pham Nam Hai and Masaaki Tanaka, “Memristive magnetic tunnel junctions with MnAs nanoparticles” , Appl. Phys. Lett. 107, pp.122404/1-5 (2015). Doi: 10.1063/1.4931141
  6. Le Duc Anh, Pham Nam Hai, Yuichi Kasahara, Yoshihiro Iwasa, and Masaaki Tanaka,”Modulation of ferromagnetism in (In,Fe)As quantum wells via electrically controlled deformation of the electron wavefunctions”, Phys. Rev. B92, pp.161201/1-5(R) (2015). Doi: 10.1103/PhysRevB.92.161201. See also at arXiv 1503.02174 (March 7, 2015)
  7. Nguyen Thanh Tu, Pham Nam Hai, Le Duc Anh, and Masaaki Tanaka, “Magnetic properties and intrinsic ferromagnetism in (Ga,Fe)Sb ferromagnetic semiconductors”, Phys. Rev. B92, pp.144403/1-14 (2015). Doi: 10.1103/PhysRevB.92.144403
  8. T. Dietl, K. Sato, T. Fukushima, A. Bonanni, M. Jamet, A. Barski, S. Kuroda, M. Tanaka, Pham Nam Hai, H. Katayama-Yoshida, “Spinodal nanodecomposition in semiconductors doped with transition metals”, Reviews of Modern Physics 87, pp.1311-1377 (2015). DOI: 10.1103/RevModPhys.87.1311. See also arXiv 1412.8062 (December 31, 2014)
  9. Le Duc Anh, Daiki Kaneko, Pham Nam Hai, and Masaaki Tanaka, “Growth and characterization of insulating ferromagnetic semiconductor (Al,Fe)Sb”, Appl. Phys. Lett. 107, pp.232405/1-4(2015). DOI: 10.1063/1.4937142
  10. Toshiki Kanaki, Hirokatsu Asahara, Shinobu Ohya, and Masaaki Tanaka, “Spin-dependent transport properties of a GaMnAs-based vertical spin metal-oxide-semiconductor field-effect transistor structure”, Appl. Phys. Lett. 107, pp.242401/1-4 (2015). Doi: 10.1063/1.4937437

2014

  1. Masaaki Tanaka, Shinobu Ohya, and Pham Nam Hai (invited) “Recent progress in III-V based ferromagnetic semiconductors: Band structure, fermi level, and tunneling transport” Applied Physics Reviews, Vol.1, pp.011102/1-26 (2014). DOI: 10.1063/1.4840136. http://dx.doi.org/10.1063/1.4840136
  2. Le Duc Anh, Pham Nam Hai, and Masaaki Tanaka, “Control of ferromagnetism by manipulating the carrier wavefunction in ferromagnetic semiconductor (In,Fe)As quantum wells”. Appl. Phys. Lett. 104, pp.042404/1-5 (2014). DOI: 10.1063/1.4863214. arXiv:1309.5283
  3. T. Amemiya, A. Ishikawa, Y. Shoji, P. N. Hai, M. Tanaka, T. Mizumoto, T. Tanaka, and S. Arai, “Three-dimensional nanostructuring in YIG ferrite with femtosecond laser”. Optics Letters 39, pp. 212-215 (2014). DOI: 10.1364/OL.39.000212. http://dx.doi.org/10.1364/OL.39.000212
  4. M. Kobayashi, H. Niwa, Y. Takeda, A. Fujimori, Y. Senba, H. Ohashi, A.Tanaka, S. Ohya, P. N. Hai, M. Tanaka, Y. Harada, and M. Oshima, “Electronic Excitations of Magnetic Impurity State in Diluted Magnetic Semiconductor (Ga,Mn)As” Phys. Rev. Lett. 112, 107203/1-4 (2014). DOI: 10.1103/PhysRevLett.112.107203
  5. Nguyen Thanh Tu, Le Duc Anh, Pham Nam Hai, Masaaki Tanaka “Epitaxial Growth and Characterization of n-type Magnetic Semiconductor (In,Co)As” Jpn. J. Appl. Phys. 53, pp.04EM05/1-5 (2014). http://dx.doi.org/10.7567/JJAP.53.04EM05
  6. Pham Nam Hai, Daiki Maruo, and Masaaki Tanaka “Visible-light electroluminescence in Mn-doped GaAs light-emitting diodes” Appl. Phys. Lett. 104, pp.122409/1-5 (2014). DOI: 10.1063/1.4869576
  7. Daisuke Sasaki, Le Duc Anh, Pham Nam Hai, and Masaaki Tanaka “Interplay between strain, quantum confinement, and ferromagnetism in strained ferromagnetic semiconductor (In,Fe)As thin films” Appl. Phys. Lett. 104, pp.142406/1-5 (2014). DOI: 10.1063/1.4870970
  8. Masaki Kobayashi, Iriya Muneta, Yukiharu Takeda, Yoshihisa Harada, Atsushi Fujimori, Juraj Krempasky, Thorsten Schmitt, Shinobu Ohya, Masaaki Tanaka, Masaharu Oshima, Vladimir N. Strocov “Unveiling the impurity band inducing ferromagnetism in magnetic semiconductor (Ga,Mn)As” Phys. Rev. B 89, pp.205204/1-8 (2014). DOI: http://dx.doi.org/10.1103/PhysRevB.89.205204. arXiv:1302.0063v1 (on 1 Feb 2013)
  9. M. Kobayashi, L. D. Anh, P. N. Hai, Y. Takeda, S. Sakamoto, T. Kadono, T. Okane, Y. Saitoh, H. Yamagami, Y. Harada, M. Oshima, M. Tanaka, and A. Fujimori, “Spin and orbital magnetic moments of Fe in the n-type ferromagnetic semiconductor (In,Fe)As” Appl. Phys. Lett. 105, pp.032403/1-4 (2014).Doi: 10.1063/1.4890733
  10. Yoshisuke Ban, Yuki Wakabayashi, Ryota Akiyama, Ryosho Nakane, and Masaaki Tanaka. “Transport properties of the Group-IV ferromagnetic semiconductor Ge1-xFex with and without boron doping” AIP Advances 4, pp.097108/1-8 (2014). Doi: 10.1063/1.4895109. arXiv: 1405.2764
  11. Pham Nam Hai, Takashi Yatsui, Motoichi Ohtsu, and Masaaki Tanaka, “High-field electroluminescence in semiconductor tunnel junctions with a Mn-doped GaAs layer” J. Appl. Phys., 116, pp.113905/1-6 (2014). Doi: 10.1063/1.4895700.
  12. Nguyen Thanh Tu, Pham Nam Hai, Le Duc Anh, and Masaaki Tanaka “(Ga,Fe)Sb: A p-type ferromagnetic semiconductor” Appl. Phys. Lett. 105, pp.132402/1-4 (2014). Doi: 10.1063/1.4896539
  13. Yuki K. Wakabayashi, Yoshisuke Ban, Shinobu Ohya, and Masaaki Tanaka “Important role of the non-uniform Fe distribution for the ferromagnetism in group-IV based ferromagnetic semiconductor GeFe” J. Appl. Phys. 116, pp.173906/1-7 (2014). Doi: 10.1063/1.4901060 “Properties of group-IV-based ferromagnetic semiconductor GeFe: Growth temperature dependence, lattice constant, location of Fe atoms, and their relevance to the magnetic properties” arXiv: 1406.2202
  14. Yuki K. Wakabayashi, Shinobu Ohya, Yoshisuke Ban, and Masaaki Tanaka, “Annealing-induced enhancement of ferromagnetism and nanoparticle formation in the ferromagnetic semiconductor GeFe” Phys. Rev. B90, pp.205209/1-7 (2014). DOI: 10.1103/PhysRevB.90.205209. arXiv: 1402.7209
  15. R. Nakane, Y. Shuto, H. Sukegawa, Z.C. Wen, S. Yamamoto, S. Mitani, M. Tanaka, K. Inomata, and S. Sugahara “Fabrication of pseudo-spin-MOSFETs using a multi-project wafer CMOS chip” Solid State Electronics, 102, pp.52-58 (2014).

2013

  1. Iriya Muneta, Hiroshi Terada, Shinobu Ohya, and Masaaki Tanaka. “Anomalous Fermi level behavior in GaMnAs at the onset of ferromagnetism” Appl. Phys. Lett. 103, pp.032411/1-4 (2013). DOI: 10.1063/1.4816133. arXiv:1208.0575

2012

  1. Ryota Akiyama, Shinobu Ohya, Pham Nam Hai, and Masaaki Tanaka “Magnetoresistance Induced by Spin-Dependent Inelastic Cotunneling in a Ferromagnetic MnAs Nanoparticle with Non-Magnetic Electrodes” J. Appl. Phys. 111, 063716/1-5 (2012). DOI: 10.1063/1.3695990
  2. Ryota Akiyama, Shinobu Ohya, Pham Nam Hai, and Masaaki Tanaka “Magnetoresistance Induced by Spin-Dependent Inelastic Cotunneling in a Ferromagnetic MnAs Nanoparticle with Non-Magnetic Electrodes” Virtual Journal of Nanoscale Science & Technology, Volume 25, Issue 15, April 9, 2012.
  3. Iriya Muneta, Shinobu Ohya, and Masaaki Tanaka “Spin-dependent tunneling transport in a ferromagnetic GaMnAs and un-doped GaAs double-quantum-well heterostructure” Appl. Phys. Lett. 100, 162409/1-3 (2012). DOI: 10.1063/1.4704154 Virtual Journal of Nanoscale Science & Technology, Volume 25, Issue 18, April 30, 2012.
  4. Pham Nam Hai, Daisuke Sasaki, Le Duc Anh, Masaaki Tanaka “Crystalline anisotropic magnetoresistance with two-fold and eight-fold symmetry in (In,Fe)As ferromagnetic semiconductor” Appl. Phys. Lett. 100, pp.262409/1-5 (2012). DOI: 10.1063/1.4730955 arXiv:1202.5874v1
  5. Ryosho Nakane, Shoichi Sato, Shun Kokutani, and Masaaki Tanaka “Appearance of Anisotropic Magnetoresistance and Electric Potential Distribution in Si-based Multi-terminal Devices with Fe Electrodes” IEEE Magnetics Lett. 3, 3000404/1-4 (2012). ISSN: 1949-307X DOI: 10.1109/LMAG.2012.2201698
  6. Shinobu Ohya, Iriya Muneta, Yufei Xin, Kenta Takata, and Masaaki Tanaka “Valence-band structure of quaternary alloy ferromagnetic semiconductor (InGaMn)As”, Phys. Rev. B86, pp.094418/1-8 (2012). DOI: 10.1103/PhysRevB.86.094418 arXiv:1208.2928. http://arxiv.org/abs/1208.2928
  7. Pham Nam Hai, Le Duc Anh, Shyam Mohan, Tsuyoshi Tamegai, Masaya Kodzuka,Tadakatsu Ohkubo, Kazuhiro Hono, and Masaaki Tanaka “Growth and characterization of n-type electron-induced ferromagnetic semiconductor (In,Fe)As” Appl. Phys. Lett. 101, pp.182403/1-5 (2012). DOI: 10.1063/1.4764947
  8. Pham Nam Hai, Le Duc Anh, and Masaaki Tanaka “Iron-based n-type electron-induced ferromagnetic semiconductor” arXiv:1106.0561v1 (submitted on 3 June, 2011) arXiv:1106.0561v3 (submitted on 4 October, 2011) http://arxiv.org/abs/1106.0561v3
  9. Pham Nam Hai, Wataru Nomura, Takashi Yatsui, Motoichi Ohtsu, and Masaaki Tanaka “Effects of laser irradiation on the self-assembly of MnAs nanoparticles in a GaAs matrix” Appl. Phys. Lett. 101, pp.193102/1-4 (2012). DOI: 10.1063/1.4765355
  10. M. Kobayashi, I. Muneta, T. Schmitt, L. Patthey, S. Ohya, M. Tanaka, M. Oshima, and V. N. Strocov, “Digging up Bulk Band Dispersions Buried under a Passivation Layer”, Appl. Phys. Lett., 101, pp.242103/1-4 (2012). DOI: 10.1063/1.4770289 http://arxiv.org/pdf/1208.5767v1
  11. Pham Nam Hai, Le Duc Anh, and Masaaki Tanaka “Electron effective mass in n-type electron-induced ferromagnetic semiconductor (In,Fe)As: Evidence of conduction band transport”, Appl. Phys. Lett. 101, pp.252410/1-5 (2012). DOI: 10.1063/1.4772630

2011

  1. Shinobu Ohya, Kenta Takata, and Masaaki Tanaka, “Nearly non-magnetic valence band of the ferromagnetic semiconductor GaMnAs”, Nature Physics 7, pp.342-347 (2011). DOI: 10.1038/NPHYS1905 cond-mat arXiv:1009.2235. URL: http://www.nature.com/nphys/journal/vaop/ncurrent/full/nphys1905.html
  2. S. Ohya, K. Takata, and M. Tanaka, “Nearly non-magnetic valence band of the ferromagnetic semiconductor GaMnAs”, Virtual Journal of Nanoscale Science & Technology, Volume 23, Issue 15. April 18, 2011. URL: http://scitation.aip.org/dbt/dbt.jsp?KEY=VIRT01&Volume=23&Issue=15&type=ALERT
  3. Shinobu Ohya, Kenta Takata, Iriya Muneta, Pham Nam Hai, and Masaak Tanaka, “Comment on “Reconciling results of tunnelling experiments on (Ga,Mn)As” arXiv:1102.3267v2 by Dietl and Sztenkiel”, cond-mat arXiv:1102.4459v3 URL: http://arxiv.org/abs/1102.4459v3
  4. Pham Nam Hai, Shinsuke Yada and Masaaki Tanaka, “Phase decomposition diagram of magnetic alloy semiconductor”, J. Appl. Phys. 109, pp.073919/1-9 (2011). DOI: 10.1063/1.3567112
  5. Shinsuke Yada, Pham Nam Hai, Satoshi Sugahara, and Masaaki Tanaka, “Structural and magnetic properties of Ge1-xMnx thin films grown on Ge (001) substrates”, J. Appl. Phys. 110, pp.073903/1-8 (2011). DOI: 10.1063/1.3638701

2010

  1. Shinobu Ohya, Iriya Muneta, Pham Nam Hai, and Masaaki Tanaka “GaMnAs-based magnetic tunnel junctions with an AlMnAs barrier” Virtual Journal of Nanoscale Science & Technology 21,No.1,(2010). http://www.vjnano.org/getabs/servlet/GetabsServlet?prog=normal&id=VIRT01000021000001000033000001&idtype=cvips&gifs=Yes&ref=no
  2. Yusuke Shuto, Ryosho Nakane, Wenhong Wang, Hiroaki Sukegawa, Shuu’ichirou Yamamoto, Masaaki Tanaka, Koichiro Inomata, and Satoshi Sugahara “A new spin-functional MOSFET based on magnetic tunnel junction technology: pseudo-spin-MOSFET” Applied Physics Express 3, pp.013003/1-3 (2010). http://arxiv.org/abs/0912.0835 (Dec 2009).
  3. Shinobu Ohya, Iriya Muneta, and Masaaki Tanaka “Quantum-level control in a III-V-based ferromagnetic-semiconductor heterostructure with a GaMnAs quantum well and double barriers” Appl. Phys. Lett. 96, 052505/1-3 (2010).
  4. Shinobu Ohya, Iriya Muneta, and Masaaki Tanaka “Quantum-level control in a III-V-based ferromagnetic-semiconductor heterostructure with a GaMnAs quantum well and double barriers” Virtual Journal of Nanoscale Science & Technology, Volume 21, Issue 7, February 15, 2010. http://www.vjnano.org/getabs/servlet/GetabsServlet?prog=normal&id=VIRT01000021000007000024000001&idtype=cvips&gifs=Yes&ref=no
  5. Shinobu Ohya, Iriya Muneta, Pham Nam Hai, and Masaaki Tanaka “Valence-Band Structure of the Ferromagnetic Semiconductor GaMnAs Studied by Spin-Dependent Resonant Tunneling Spectroscopy” Phys. Rev. Lett. 104, 167204 (2010).
  6. Shinobu Ohya, Iriya Muneta, Pham Nam Hai, and Masaaki Tanaka “Valence-Band Structure of Ferromagnetic-Semiconductor GaMnAs Studied by Spin-Dependent Resonant Tunneling Spectroscopy” Virtual Journal of Nanoscale Science & Technology, Volume 21, Issue 18, May 3, 2010. http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=VIRT01000021000018000024000001&idtype=cvips&gifs=yes&ref=no
  7. Pham Nam Hai, Shinobu Ohya, and Masaaki Tanaka “Long spin-relaxation time in a single metal nanoparticle” Nature Nanotechnology 5, pp.593-596 (2010). published online on July 4, 2010. (DOI 10.1038/NNANO.2010.130.)
  8. R. Nakane, T. Harada, K. Sugiura, S. Sugahara, and M. Tanaka “Spin-dependent transport of spin MOSFETs with ferromagnetic MnAs source and drain contacts: Spin injection and transport in a Si MOS channel” Jpn. J. Appl. Phys. 49, pp.113001/1-3 (2010). cond-mat arXiv:1002.0057
  9. Shinsuke Yada, Ryohei Okazaki, Shinobu Ohya, and Masaaki Tanaka “Single-Crystalline Ferromagnetic Alloy Semiconductor Ge1-xMnx Grown on Ge (111)” Applied Physics Express 3, pp.123002/1-3 (2010)

2009

  1. M. Yokoyama, S. Ohya, and M. Tanaka “Strong In-plane Uniaxial Magnetic Anisotropy of [(InyGa1-y)1-xMnx]As Characterized by Planar Hall Effect” Jpn. J. Appl. Phys. 48, 023001/1-4 (2009).
  2. M. Tanaka, M. Yokoyama, P-N. Hai, and S. Ohya (Invited review paper) “Properties and functionalities of MnAs/III-V hybrid and composite structures” in Spintronics, Semiconductors and Semimetals, Vol. 82, edited by T. Dietl, D. D. Awschalom, M. Kaminska, and H. Ohno (Academic Press, New York, November 2008). 500 pages, ISBN-13: 978-0-08-044956-2, ISBN-10: 0-08-044956-5
  3. Pham Nam Hai, Shinobu Ohya, Masaaki Tanaka, Stewart E.Barnes, Sadamichi Maekawa “Electromotive force and huge magnetoresistance in magnetic tunnel junctions” Nature 458, pp.489-492 (2009). Online published on March 8, 2009, doi: 10.1038/nature07879 http://www.nature.com/nature/journal/vaop/ncurrent/abs/nature07879.html
  4. S. Nakagawa, M. Yokoyama, O. Ichikawa, M. Hata, M. Tanaka, M. Takenaka, S. Takagi “Investigation of InAlAs oxide/InP metal-oxide-semiconductor structures formed by wet thermal oxidation” Jpn. J. Appl. Phys. 48, 04C093/1-4 (2009).
  5. Shinobu Ohya, Iriya Muneta, Pham Nam Hai, and Masaaki Tanaka “GaMnAs-based magnetic tunnel junctions with an AlMnAs barrier” Appl. Phys. Lett. 95, 242503/1-3 (2009). http://arxiv.org/abs/0912.3045 (Dec 2009)