論文など
2024
- Anisotropic Optical Conductivity Accompanied by a Small Energy Gap in One-Dimensional Thermoelectric Telluride Ta4SiTe4,
Fumiya Matsunaga, Yoshihiko Okamoto*, Yasunori Yokoyama, Kanji Takehana, Yasutaka Imanaka, Yuto Nakamura, Hideo Kishida, Shoya Kawano, Kazuyuki Matsuhira, and Koshi Takenaka,
Phys. Rev. B 109, L161105(1-6) (2024). (arXiv:2311.13031) - 1次元ファンデルワールス結晶Ta4SiTe4における熱電効果,
岡本佳比古*, 山川洋一, 竹中康司,
固体物理 59, 95-105 (2024). - クロムテルル化物焼結体に現れる巨大な磁場誘起体積変化,
岡本佳比古*, 竹中康司,
FC Report 42, 7-12 (2024). - Superconductivity in Ternary Zirconium Telluride Zr6MTe2 with 3d Transition Metals,
Haruka Matsumoto, Youichi Yamakawa, Ryutaro Okuma, Daisuke Nishio-Hamane, and Yoshihiko Okamoto*,
J. Phys. Soc. Jpn. 93, 023705(1-5) (2024). (arXiv:2401.04870) - Superconductivity in Ternary Germanide ScPdGe and Silicide ScPdSi,
Yusaku Shinoda, Yoshihiko Okamoto*, Youichi Yamakawa, Hiroshi Takatsu, Hiroshi Kageyama, Daigorou Hirai, and Koshi Takenaka,
J. Phys. Soc. Jpn. 93, 023701(1-4) (2024). (arXiv:2312.06045)
2023
- Electroactive Actuator Composites Using Volume Change Induced by Insulator-to-Metal Transition in VO2,
K. Takenaka*, Y. Mizuno, J. Shibutani, K. Kishida, K. Takada, K. Yagi, Y. Yokoyama, N. Katayama, Y. Okamoto, D. Hirai, T. Hatano, and A. Fujita,
Appl. Phys. Lett. 123, 231905(1-6) (2023).
(Featured Article) - Evidence of Unconventional Superconductivity on the Surface of the Nodal Semimetal CaAg1-xPdxP,
Rikizo Yano*, Shota Nagasaka, Naoki Matsubara, Kazushige Saigusa, Tsuyoshi Tanda, Seiichiro Ito, Ai Yamagake, Yoshihiko Okamoto*, Koshi Takenaka, and Satoshi Kashiwaya*,
Nat. Commun. 14, 6817(1-6) (2023) (open access).
(プレスリリース:トポロジカル物質における表面超伝導を発見 ~新しいタイプの非従来型超伝導物質~) - Superconductivity in Ternary Scandium Telluride Sc6MTe2 with 3d, 4d, and 5d Transition Metals,
Yusaku Shinoda, Yoshihiko Okamoto*, Youichi Yamakawa, Haruka Matsumoto, Daigorou Hirai, and Koshi Takenaka,
J. Phys. Soc. Jpn. 92, 103701(1-5) (2023) (open access). (arXiv:2304.01444)
(JPSJ Papers of Editors' Choice)
(物性研ニュース:さまざまな磁性元素を含む新しい超伝導体ファミリーの発見)
(JPSJ注目論文:新しい超伝導体ファミリー:異なる磁性元素をもつ7個の新超伝導体の発見)
(JPSJ Hot Topics: A New Superconductor Family with Various Magnetic Elements) - Structural and Electronic Properties of a Triangular Lattice Magnet NaPrTe2 Compared with NaNdTe2 and NaTbTe2,
Koki Eto, Yoshihiko Okamoto*, Naoyuki Katayama, Hajime Ishikawa, Koichi Kindo, and Koshi Takenaka,
J. Phys. Soc. Jpn. 92, 094707(1-6) (2023). (arXiv:2307.06516) - クロム化合物磁性体における磁場誘起歪,
岡本佳比古*, 竹中康司,
固体物理 58, 273-282 (2023). - Signatures of a Magnetic Superstructure Phase Induced by Ultrahigh Magnetic Fields in a Breathing Pyrochlore Antiferromagnet,
Masaki Gen*, Akihiko Ikeda, Kazushi Aoyama, Harald O. Jeschke, Yuto Ishii, Hajime Ishikawa, Takeshi Yajima, Yoshihiko Okamoto, Xuguang Zhou, Daisuke Nakamura, Shojiro Takeyama, Koichi Kindo, Yasuhiro H. Matsuda, Yoshimitsu Kohama*,
Proc. Natl. Acad. Sci. 120, e2302756120(1-7) (2023). (arXiv:2301.09509)
(物性研ニュース:フラストレート磁性体の新たな多段相転移を発見 ―未踏超強磁場領域での直接磁化検出―) - Large Magnetic-Field-Induced Strains in Sintered Chromium Tellurides,
Yuki Kubota, Yoshihiko Okamoto*, Tomoya Kanematsu, Takeshi Yajima, Daigorou Hirai, and Koshi Takenaka,
Appl. Phys. Lett. 122, 042404(1-6) (2023). (arXiv:2211.13388)
(プレスリリース:磁場により体積が大きく膨張する新材料の発見 ―新たなアクチュエータ材料としての応用に期待―) - Systematic Study on the Role of the Third Zn-Site Element in Zn2-xMgxP2O7 Showing Giant Negative Thermal Expansion,
Ryota Kasugai, Yoshifumi Kadowaki, Yasunori Yokoyama, Naoyuki Katayama, Yoshihiko Okamoto, and Koshi Takenaka*,
Mater. Trans. 64, 638-642 (2023). - Two-Band Model and Point Contact Spectroscopy of Nodal-Line Semimetal CaAg0.9Pd0.1P,
Naoki Matsubara*, Shota Nagasaka, Rikizo Yano, Kazushige Saigusa, Yusaku Shinoda, Yoshihiko Okamoto, Koshi Takenaka, and Satoshi Kashiwaya,
JPS Conf. Proc. 38, 011028(1-6) (2023).
2022
- Electronic Properties of Pyrochlore-Type Ca2Ir2O7,
Yuki Nakayama, Yoshihiko Okamoto*, Daigorou Hirai, and Koshi Takenaka,
J. Phys. Soc. Jpn. 91, 125002(1-2) (2022). (arXiv:2211.09290) - Electronic Structure Reconstruction by Trimer Formation in CsW2O6 Studied by X-Ray Photoelectron Spectroscopy,
R. Nakamura, D. Takegami, A. Melendez-Sans, L. H. Tjeng, M. Okawa, T. Miyashino, N. L. Saini, M. Kitamura, D. Shiga, H. Kumigashira, M. Yoshimura, K.-D. Tsuei, Y. Okamoto, and T. Mizokawa,
Phys. Rev. B 106, 195104(1-6) (2022). - Electrical-Field-Induced Insulator-to-Metal Transition in Samarium Monosulfides,
K. Kishida, J. Shibutani, T. Hatano, Y. Yokoyama, N. Katayama, Y. Okamoto, Y. Nakamura, H. Kishida, H. S. Suzuki, K. Takehana, Y. Imanaka, and K. Takenaka*,
Appl. Phys. Lett. 121, 121901(1-6) (2022). - Complex Magnetic Phase Diagram with a Small Phase Pocket in a Three-Dimensional Frustrated Magnet CuInCr4S8,
M. Gen*, H. Ishikawa, A. Ikeda, A. Miyake, Z. Yang, Y. Okamoto, M. Mori, K. Takenaka, T. Kurumaji, Y. Tokunaga, T. Arima, M. Tokunaga, K. Kindo, Y. H. Matsuda, Y. Kohama,
Phys. Rev. Research 4, 033148(1-13) (2022). (arXiv:2112.08990)