Junichi Shiogai

  • 塩貝 純一
  • 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
  • Department of Physics,
    Graduate School of Science,
    Osaka University
  • Tel: +81-6-6850-5374
  • E-mail:
Junichi Shiogai

CV

Mar. 2009 Doctor in Engineering, Tohoku University
Apr. 2014 - Sep. 2021 Assistant Professor, Institute for Materials Research, Tohoku University
Oct. 2021 -present Associate Professor, Department of Physics, Osaka University

Research Field

Thin film growth, Spintronics, Topological Matter, Superconductivity, Electric-field effect

Selected papers

Umbrella spin structure of CrSe thin film
Yusuke Tajima, Junichi Shiogai, Kohei Ueda, Hirotake Suzaki, Kensuke Takaki, Takeshi Seki, Kazutaka Kudo, and Jobu Matsuno
Non-coplanar spin structure in a metallic thin film of triangular lattice antiferromagnet CrSe
APL Mater. 12, 041112 (2024)

Superconductivity in FeSe freestanding membrane
Junichi Shiogai and Atsushi Tsukazaki
Superconducting FeSe membrane synthesized by etching of water-soluble Sr3Al2O6 layer
Appl. Phys. Lett. 122, 052602 (2023)
Selected as Editor's pick.

Mesoscopic device based on magnetic Weyl semimetal
Junichi Shiogai, Junya Ikeda, Kohei Fujiwara, Takeshi Seki, Koki Takanashi, and Atsushi Tsukazaki
Electrical detection of domain evolution in magnetic Weyl semimetal Co3Sn2S2 submicrometer-wide wire devices
Phys. Rev. Mater. 6, 114203 (2022)

3D magnetic-field sensor
Junichi Shiogai, Kohei Fujiwara, Tsutomu Nojima, and Atsushi Tsukazaki
Three-dimensional sensing of the magnetic-field vector by a compact planar-type Hall device
Commun. Mater. 2, 102 (2021)


Topological band engineering in perovskite oxide BaSn1-xPbxO3 thin films
Junichi Shiogai, Takumaru Chida, Kenichiro Hashimoto, Kohei Fujiwara, Takahiko Sasaki, and Atsushi Tsukazaki
Signature of band inversion in the perovskite thin-film alloys BaSn1-xPbxO3
Phys. Rev. B 101, 125125 (2020)


Topological phase transition in Fe-doped Bi2Se3 thin films
img_07 Y. Satake, J. Shiogai, G. P. Mazur, S. Kimura, S. Awaji, K. Fujiwara, T. Nojima, K. Nomura, S. Souma, T. Sato, T. Dietl, and A. Tsukazaki
Magnetic-field-induced topological phase transition in Fe-doped (Bi,Sb)2Se3 heterostructures
Phys. Rev. Materials 4, 044202 (2020)

Increased Tc in feSe-EDLT with divalent ionic liquid
img_07 Tomoki Miyakawa, Junichi Shiogai, Sunao Shimizu, Michio Matsumoto, Yukihiro Ito, Takayuki Harada, Kohei Fujiwara, Tsutomu Nojima, Yoshimitsu Itoh, Takuzo Aida, Yoshihiro Iwasa, and Atsushi Tsukazaki
Enhancement of superconducting transition temperature in FeSe electric-double-layer transistor with multivalent ionic liquids
Phys. Rev. Mater. 2, 031801(R) (2018)

Band engineering in topological insulator (Bi1-xSbx)2Se3 thin films
img_07 Yosuke Satake, Junichi Shiogai, Daichi Takane, Keiko Yamada, Kohei Fujiwara, Seigo Souma, Takafumi Sato, Takashi Takahashi, Atsushi Tsukazaki
Fermi-level tuning of the Dirac surface state in (Bi1-xSbx)2Se3 thin films
J. Phys. Condens. Matter 30, 085501 (2018)


Spin-orbit interaction in a layered III-VI compound semiconductor
img_07Shoichi Takasuna, Junichi Shiogai, Shunichiro Matsuzaka, Makoto Kohda, Yutaka Oyama, and Junsaku Nitta
Weak antilocalization induced by Rashba spin-orbit interaction in layered III-VI compound semiconductor GaSe thin films
Phys. Rev. B 96, 161303(R) (2017)

Superconductivity in ultra-thin FeSe film
img_07J. Shiogai, Y Ito, T. Mitsuhashi, T. Nojima, and A. Tsukazaki
Electric-field-induced superconductivity in electrochemically-etched ultrathin FeSe films on SrTiO3 and MgO
Nature Phys. 12, 42 (2016)


Spin shot noise
img_07Tomonori Arakawa, Junichi Shiogai, Mariusz Ciorga, Martin Utz, Dieter Schuh, Makoto Kohda, Junsaku Nitta, Dominique Bougeard, Dieter Weiss, Teruo Ono, and Kensuke Kobayashi
Shot Noise Induced by Nonequilibrium Spin Accumulation
Phys. Rev. Lett. 114, 016601 (2015)

Spin injection in semiconductor
img_07Junichi Shiogai, Mariusz Ciorga, Martin Utz, Dieter Schuh, Makoto Kohda, Dominique Bougeard, Tsutomu Nojima, Junsaku Nitta, and Dieter Weiss
Giant enhancement of spin detection sensitivity in (Ga,Mn)As/GaAs Esaki diodes
Phys. Rev. B 89, 081307(R) (2014)


Publications

    2024

  1. Yusuke Tajima, Junichi Shiogai, Kohei Ueda, Hirotake Suzaki, Kensuke Takaki, Takeshi Seki, Kazutaka Kudo, and Jobu Matsuno
    Non-coplanar spin structure in a metallic thin film of triangular lattice antiferromagnet CrSe
    APL Mater. 12, 041112 (2024). doi.org/10.1063/5.0201786

    2. 2023

  2. Ryuji Atsumi, Junichi Shiogai, Takumi Yamazaki, Takeshi Seki, Kohei Ueda, and Jobu Matsuno
    Impact of epitaxial strain relaxation on ferromagnetism in a freestanding La2/3Sr1/3MnO3 membrane
    Jpn. J. Appl. Phys. 62, 100902 (2023). doi.org/10.35848/1347-4065/ad0270

  3. Junichi Shiogai and Atsushi Tsukazaki
    Superconducting FeSe membrane synthesized by etching of water-soluble Sr3Al2O6 layer
    Appl. Phys. Lett. 122, 052602 (2023). doi.org/10.1063/5.0135702

  4. Kohei Fujiwara, Yasuyuki Kato, Hitoshi Abe, Shun Noguchi, Junichi Shiogai, Yasuhiro Niwa, Hiroshi Kumigashira, Yukitoshi Motome, and Atsushi Tsukazaki
    Berry curvature contributions of kagome-lattice fragments in amorphous Fe–Sn thin films
    Nature Commun. 14, 3399 (2023). doi.org/10.1038/s41467-023-39112-1

  5. H. Sakai, K. Nakagawa, K. Tsuruda, J. Shiogai, K. Akiba, M. Tokunaga, S. Kimura, S. Awaji, A. Tsukazaki, H. Murakawa, and N. Hanasaki
    Variation of Landau level splitting in the Fermi level controlled Dirac metals (Eu,Gd)MnBi2
    Phys. Rev. B 108, 115142 (2023). doi.org/10.1103/PhysRevB.108.115142

    6. 2022

  6. Junichi Shiogai, Junya Ikeda, Kohei Fujiwara, Takeshi Seki, Koki Takanashi, and Atsushi Tsukazaki
    Electrical detection of domain evolution in magnetic Weyl semimetal Co3Sn2S2 submicrometer-wide wire devices
    Phys. Rev. Mater. 6, 114203 (2022). doi.org/10.1103/PhysRevMaterials.6.114203

  7. Junichi Shiogai, Kohei Fujiwara, Tsutomu Nojima, and Atsushi Tsukazaki
    A large unidirectional magnetoresistance in Fe–Sn heterostructure devices
    Jpn. J. Appl. Phys. 61, 083001 (2022). doi.org/10.35848/1347-4065/ac7bc8

  8. Junichi Shiogai, Zhengu Jin, Yosuke Satake, Kohei Fujiwara, and Atsushi Tsukazaki
    Improvement of the detectivity in an Fe–Sn magnetic-field sensor with a large current injection
    Jpn. J. Appl. Phys. 61, SC1069 (2022). doi.org/10.35848/1347-4065/ac465a

  9. Kohei Fujiwara, Koya Shibata, Shunsuke Nishimura, Junichi Shiogai, and Atsushi Tsukazaki
    L21 ordering of Co2FeSn thin films promoted by high-temperature annealing
    AIP Adv. 12, 065030 (2022). doi.org/10.1063/5.0093195

    10. 2021

  10. Junichi Shiogai, Kohei Fujiwara, Tsutomu Nojima, and Atsushi Tsukazaki
    Three-dimensional sensing of the magnetic-field vector by a compact planar-type Hall device
    Commun. Mater. 2, 102 (2021). doi.org/10.1038/s43246-021-00206-2

  11. Junichi Shiogai, Junya Ikeda, Kohei Fujiwara, Takeshi Seki, Koki Takanashi, and Atsushi Tsukazaki
    Robust perpendicular magnetic anisotropy of Co3Sn2S2 phase in sulfur deficient sputtered thin films
    Phys. Rev. Materials 5, 024403 (2021). doi.org/10.1103/PhysRevMaterials.5.024403

  12. Junya Ikeda, Kohei Fujiwara, Junichi Shiogai, Takeshi Seki, Kentaro Nomura, Koki Takanashi, and Atsushi Tsukazaki
    Critical thickness for the emergence of Weyl features in Co3Sn2S2 thin films
    Commun. Mater. 2, 18 (2021). doi.org/10.1038/s43246-021-00122-5

  13. Junya Ikeda, Kohei Fujiwara, Junichi Shiogai, Takeshi Seki, Kentaro Nomura, Koki Takanashi, and Atsushi Tsukazaki
    Two-dimensionality of metallic surface conduction in Co3Sn2S2 thin films
    Commun. Phys. 4, 117 (2021). doi.org/10.1038/s42005-021-00627-y

    14. 2020

  14. Junichi Shiogai, Takumaru Chida, Kenichiro Hashimoto, Kohei Fujiwara, Takahiko Sasaki, and Atsushi Tsukazaki
    Signature of band inversion in the perovskite thin-film alloys BaSn1−xPbxO3
    Phys. Rev. B 101, 125125 (2020). doi.org/10.1103/PhysRevB.101.125125

  15. K. Takahashi, J. Shiogai, H. Inoue, S. Ito, S. Kimura, S. Awaji, and A. Tsukazaki
    Single-domain formation of SrMnBi2 films on polar LaAlO3 substrate
    AIP Adv. 10, 105216 (2020). doi.org/10.1063/5.0021771

  16. T. Arakawa, J. Shiogai, M. Maeda, M. Ciorga, M. Utz, D. Schuh, Y. Niimi, M. Kohda, J. Nitta, D. Bougeard, D. Weiss, and K. Kobayashi
    Tunneling mechanism in a (Ga,Mn)As/GaAs-based spin Esaki diode investigated by bias-dependent shot noise measurements
    Phys. Rev. B 102, 045308 (2020). doi.org/10.1103/PhysRevB.102.045308

  17. Dingheng Zheng, Junichi Shiogai, Hisashi Inoue, Seigo Souma, Takafumi Sato, and Atsushi Tsukazaki
    Two-dimensional growth of conductive ultra-thin Sn films on insulating substrate with an Fe buffer layer
    APL Mater. 8, 061103 (2020). doi.org/10.1063/5.0009012

  18. Y. Satake, J. Shiogai, G. P. Mazur, S. Kimura, S. Awaji, K. Fujiwara, T. Nojima, K. Nomura, S. Souma, T. Sato, T. Dietl, and A. Tsukazaki
    Magnetic-field-induced topological phase transition in Fe-doped (Bi,Sb)2Se3 heterostructures
    Phys. Rev. Materials 4, 044202 (2020). doi.org/10.1103/PhysRevMaterials.4.044202

  19. K. Miura, K. Fujiwara, J. Shiogai, T. Nojima, and A. Tsukazaki
    Electrical detection of the antiferromagnetic transition in MnTiO3 ultrathin films by spin Hall magnetoresistance
    J. of Appl. Phys. 127, 103903 (2020). doi.org/10.1063/1.5142193

    20. 2019

  20. Junichi Shiogai, Zhenhu Jin, Yosuke Satake, Kohei Fujiwara, and Atsushi Tsukazaki
    Low-frequency noise measurements on Fe-Sn Hall sensors
    Appl. Phys. Express 12, 123001 (2019). doi.org/10.7567/1882-0786/ab506a

  21. Kohei Fujiwara, Junya Ikeda, Junichi Shiogai, Takeshi Seki, Koki Takanashi, and Atsushi Tsukazaki
    Ferromagnetic Co3Sn2S2 thin films fabricated by co-sputtering
    Jpn. J. Appl. Phys. 58, 050912 (2019). doi.org/10.7567/1347-4065/ab12ff

  22. Kohei Fujiwara, Yosuke Satake, Junichi Shiogai, and Atsushi Tsukazaki
    Doping-induced enhancement of anomalous Hall coefficient in Fe-Sn nanocrystalline films for highly sensitive Hall sensors
    APL Mater. 7, 111103 (2019). doi.org/10.1063/1.5126499

  23. Sunao Shimizu, Junichi Shiogai, Nayuta Takemori, Shiro Sakai, Hiroaki Ikeda, Ryotaro Arita, Tsutomu Nojima, Atsushi Tsukazaki, and Yoshihiro Iwasa
    Giant thermoelectric power factor in ultrathin FeSe superconductor
    Nature Commun. 10, 825 (2019). doi.org/10.1038/s41467-019-08784-z

  24. Shang Gao, Max Hirschberger, Oksana Zaharko, Taro Nakajima, Takashi Kurumaji, Akiko Kikkawa, Junichi Shiogai, Atsushi Tsukazaki, Shojiro Kimura, Satoshi Awaji, Yasujiro Taguchi, Taka-hisa Arima, and Yoshinori Tokura
    Ordering phenomena of spin trimers accompanied by a large geometrical Hall effect
    Phys. Rev. B 100, 241115(R) (2019).

  25. Y. Satake, K. Fujiwara, J. Shiogai, T. Seki, and A. Tsukazaki
    Fe-Sn nanocrystalline films for flexible magnetic sensors with high thermal stability
    Sci. Rep. 9, 3282 (2019). doi.org/10.1038/s41598-019-39817-8

  26. Kohei Fujiwara, Hiroya Minato, Junichi Shiogai, Akihito Kumamoto, Naoya Shibata, and Atsushi Tsukazaki
    Thin-film stabilization of LiNbO3-type ZnSnO3 and MgSnO3 by molecular-beam epitaxy
    APL Mater. 7, 022505 (2019). doi.org/10.1063/1.5054289

    27. 2018

  27. Dingheng Zheng, Junichi Shiogai, Kohei Fujiwara, and Atsushi Tsukazaki
    Pulsed-laser deposition of InSe thin films for the detection of thickness-dependent bandgap modification
    Appl. Phys. Lett. 113, 253501 (2018).

  28. Yosuke Satake, Junichi Shiogai, Kohei Fujiwara, and, Atsushi Tsukazaki
    The effect of depletion region in topological insulator heterostructures for ambipolar field-effect transistors
    Phys. Rev. B 98, 125415 (2018).

  29. Junichi Shiogai, Shojiro Kimura, Satoshi Awaji, Tsutomu Nojima, and Atsushi Tsukazaki
    Anisotropy of the upper critical field and its thickness dependence in superconducting FeSe electric-double-layer transistors
    Phys. Rev. B 97, 174520 (2018).

  30. T. Harada, J. Shiogai, T. Miyakawa, T. Nojima, and A. Tsukazaki
    Critical-current enhancement driven by suppression of superconducting fluctuation in ion-gated ultrathin FeSe
    Supercond. Sci. Technol. 31, 055003 (2018).

  31. J. Shiogai, M. Ciorga, M. Utz, D. Schuh, M. Kohda, D. Bougeard, T. Nojima, D. Weiss, and J. Nitta
    Spatial variation of dynamic nuclear spin polarization probed by the non-local Hanle effect
    Appl. Phys. Lett. 112, 132403 (2018).

  32. Tomoki Miyakawa, Junichi Shiogai, Sunao Shimizu, Michio Matsumoto, Yukihiro Ito, Takayuki Harada, Kohei Fujiwara, Tsutomu Nojima, Yoshimitsu Itoh, Takuzo Aida, Yoshihiro Iwasa, and Atsushi Tsukazaki
    Enhancement of superconducting transition temperature in FeSe electric-double-layer transistor with multivalent ionic liquids
    Phys. Rev. Mater. 2, 031801(R) (2018).

  33. Yosuke Satake, Junichi Shiogai, Daichi Takane, Keiko Yamada, Kohei Fujiwara, Seigo Souma, Takafumi Sato, Takashi Takahashi, and Atsushi Tsukazaki
    Fermi-level tuning of the Dirac surface state in (Bi1-xSbx)2Se3 thin films
    J. Phys. Condens. Matter 30, 085501 (2018).

  34. Y. Fujishiro, N. Kanazawa, T. Shimojima, A. Nakamura, K. Ishizaka, T. Koretsune, R. Arita, A. Miyake, H. Mitamura, K. Akiba, M. Tokunaga, J. Shiogai, S. Kimura, S. Awaji, A. Tsukazaki, A. Kikkawa, Y. Taguchi, and Y. Tokura
    Large magneto-thermopower in MnGe with topological spin texture
    Nature Comm. 9, 408 (2018). DOI: 10.1038/s41467-018-02857-1

    35. 2017

  35. Shoichi Takasuna, Junichi Shiogai, Shunichiro Matsuzaka, Makoto Kohda, Yutaka Oyama, and Junsaku Nitta
    Weak antilocalization induced by Rashba spin-orbit interaction in layered III-VI compound semiconductor GaSe thin films
    Phys. Rev. B 96, 161303(R) (2017).

  36. K. Fujiwara, J. Shiogai, and A. Tsukazaki
    Fabrication of tetragonal FeSe-FeS alloy film with high sulfur contents by alternate deposition
    Jpn. J. Appl. Phys. 56, 100308 (2017).

  37. K. Fujiwara, K. Nishihara, J. Shiogai, and A. Tsukazaki
    Enhanced electron mobility at the two-dimensional metallic surface of BaSnO3 electric-double-layer transistor at low temperatures
    Appl. Phys. Lett. 110, 203503 (2017).

  38. Junichi Shiogai, Tomoki Miyakawa, Yukihiro Ito, Tsutomu Nojima, and Atsushi Tsukazaki
    Unified trend of superconducting transition temperature against Hall coefficient for ultrathin FeSe films prepared on different oxide substrates
    Phys. Rev. B 95, 115101 (2017).

    39. 2016

  39. K. Fujiwara, K. Nishihara, J. Shiogai, and A. Tsukazaki
    High field-effect mobility at the (Sr,Ba)SnO3/BaSnO3 interface
    AIP Advances 6, 085014 (2016). DOI: 10.1063/1.4961637

  40. Junichi Shiogai, Kazuki Nishihara, Kazuhisa Sato and Atsushi Tsukazaki
    Improvement of electron mobility in La:BaSnO3 thin films by insertion of an atomically flat insulating (Sr,Ba)SnO3 buffer layer
    AIP Advances 6, 065305 (2016). DOI: 10.1063/1.4953808

  41. H. Masuda, H. Sakai, M. Tokunaga,Y. Yamasaki, A. Miyake, J. Shiogai, S. Nakamura, S. Awaji, A. Tsukazaki, H. Nakao, Y. Murakami, T. -H. Arima, Y. Tokura, S. Ishiwata
    Quantum Hall effect in a bulk antiferromagnet EuMnBi2 with magnetically confined two-dimensional Dirac fermions
    Science Advances 2, e1501117 (2016). DOI: 10.1126/sciadv.1501117

  42. J. Shiogai, Y. Ito, T. Mitsuhashi, T. Nojima, and A. Tsukazaki
    Electric-field-induced superconductivity in electrochemically-etched ultrathin FeSe films on SrTiO3 and MgO
    Nature Phys. 12, 42 (2016).

    43. 2015

  43. Junichi Shiogai, Tatsuro Ohashi, Tim Yang, Makoto Kohda, Takeshi Seki, Koki Takanashi, and Junsaku Nitta
    Enhancement of electric field modulation of coercivity in Pt / Co / Al-O structures by tuning Co surface oxidation
    J. Phys. D: Appl. Phys. 49, 03LT01 (2015).

  44. K. Ueda, J. Fujioka, B.-J. Yang, J. Shiogai, A. Tsukazaki, S. Nakamura, S. Awaji, N. Nagaosa, and Y. Tokura
    Magnetic Field-Induced Insulator-Semimetal Transition in a Pyrochlore Nd2Ir2O7
    Phys. Rev. Lett. 115, 056402 (2015).

  45. J. Shiogai, M. Ciorga, M. Utz, D. Schuh, M. Kohda, D. Bougeard, T. Nojima, D. Weiss, and J. Nitta
    In-plane tunneling anisotropic magnetoresistance in (Ga,Mn)As/GaAs Esaki diodes in the regime of the excess current
    Appl. Phys. Lett. 106, 262402 (2015).

  46. R. Ohsugi, J. Shiogai, Y. Kunihashi, M. Kohda, H. Sanada, T. Seki, M. Mizuguchi, H. Gotoh, K. Takanashi, and J. Nitta
    Comparison of electrical and optical detection of spin injection in L10-FePt/MgO/GaAs hybrid structures
    J. Phys. D Appl. Phys. 48 164003 (2015).

  47. Tomonori Arakawa, Junichi Shiogai, Mariusz Ciorga, Martin Utz, Dieter Schuh, Makoto Kohda, Junsaku Nitta, Dominique Bougeard, Dieter Weiss, Teruo Ono, and Kensuke Kobayashi
    Shot Noise Induced by Nonequilibrium Spin Accumulation
    Phys. Rev. Lett. 114, 016601 (2015).

    48. 2014

  48. Junichi Shiogai, Mariusz Ciorga, Martin Utz, Dieter Schuh, Makoto Kohda, Dominique Bougeard, Tsutomu Nojima, Junsaku Nitta, and Dieter Weiss
    Giant enhancement of spin detection sensitivity in (Ga,Mn)As/GaAs Esaki diodes
    Phys. Rev. B 89, 081307(R) (2014).

  49. Markus Ehlert, Cheng Song, Mariusz Ciorga, Thomas Hupfauer, Junichi Shiogai, Martin Utz, Dieter Schuh, Dominique Bougeard, and Dieter Weiss
    All-electrical detection of spin Hall effect in semiconductors
    Phys. Status Solidi B 251, 1725 (2014). DOI: 10.1002/pssb.201350206 (2014)

    50. 2012

  50. J. Shiogai, M. Ciorga, M. Utz, D. Schuh, T. Arakawa, M. Kohda, K. Kobayashi, T. Ono, W. Wegscheider, D. Weiss, and J. Nitta
    Dynamic nuclear spin polarization in an all-semiconductor spin injection device with (Ga,Mn)As/n-GaAs spin Esaki diode
    Appl. Phys. Lett. 101, 212402 (2012).

    51. 2011

  51. J. Shiogai, D. Schuh, W. Wegscheider, M. Kohda, J. Nitta, and D. Weiss
    Magnitude and sign control of lithography-induced uniaxial anisotropy in ultra-thin (Ga,Mn)As wires
    Appl. Phys. Lett. 98, 083101 (2011).

    52. 2010

  52. M. Kohda, J. Ogawa, J. Shiogai, F. Matsukura, Y. Ohno, H. Ohno, and J. Nitta
    Width and temperature dependence of lithography-induced magnetic anisotropy in (Ga,Mn)As
    Physica E 42, 2685 (2010).