横山 淳

論文

• Magnetic Quantum Criticality inside the Superconducting State Revealed by Penetration Depth Scaling with Local Tc

  Yusuke Iguchi, Kaede Inoh, Ryosuke Koizumi, Makoto Yokoyama

  Physical Review Letters 137(9) 096001-1-096001-6 2026年8月26日 査読有り最終著者
• Carrier-doping effect and anomalous transport properties in Ni-doped CeCoIn5 investigated by Hall resistivity measurements

  Ryosuke Koizumi, Hayao Fujimoto, Teppei Takahashi, Azumi Yashiro, Haruna Kawakami, Kazuki Ishii, Hinako Kosaka, Takeshi Hasegawa, Yusei Shimizu, Ai Nakamura …

  Physical Review B 113(22) 224514-1-224514-10 2026年6月9日 査読有り最終著者責任著者
• Continuously evolving antiferromagnetic order within the superconducting phase in Zn-doped CeCoIn5

  Kaede Inoh, Ryosuke Koizumi, Teppei Takahashi, Hayao Fujimoto, Hideaki Ebisawa, Azumi Yashiro, Mika Kohinata, Asuka Hosogai, Akira Matsuo, Koichi Kindo …

  Physical Review B 111(10) 104510-1-104510-9 2025年3月17日 査読有り最終著者責任著者
• Quantum criticality linked to the suppressed superconducting upper critical field in Ni-doped CeCoIn5

  Azumi Yashiro, Rahmanto, Kaketo Inami, Kohei Suzuki, Kaede Inoh, Teppei Takahashi, Ryosuke Koizumi, Yohei Kono, Shunichiro Kittaka, Yusei Shimizu …

  Physical Review Materials 8(8) L081801-1-L081801-6 2024年8月8日 査読有り最終著者責任著者
• Modulation vector of the Fulde-Ferrell-Larkin-Ovchinnikov state in CeCoIn5 revealed by high-resolution magnetostriction measurements

  S. Kittaka, Y. Kono, K. Tsunashima, D. Kimoto, M. Yokoyama, Y. Shimizu, T. Sakakibara, M. Yamashita, and K. Machida

  Physical Review B 107 L220505-1-L220505-6 2023年6月 査読有り
• Weyl-Kondo semimetal behavior in the chiral structure phase of Ce3Rh4Sn13

  K. Iwasa, K. Suyama, S. Ohira-Kawamura, K. Nakajima, S. Raymond, P. Steffens, A. Yamada, T. D. Matsuda, Y. Aoki, I. Kawasaki …

  Physical Review Materials 7(1) 014201-1-014201-11 2023年1月 査読有り最終著者
• Nested antiferromagnetic spin fluctuations and non-Fermi-liquid behavior in electron-doped CeCo1-xNixIn5

  H. Sakai, Y. Tokunaga, S. Kambe, J.-X. Zhu, F. Ronning, J. D. Thompson, H. Kotegawa, H. Tou, K. Suzuki, Y. Oshima …

  Physical Review B 106(23) 235152-1-235152-8 2022年12月 査読有り最終著者
• Direct measurement of the evolution of magnetism and superconductivity toward the quantum critical point

  W. Higemoto, M. Yokoyama, T. U. Ito, T. Suzuki, S. Raymond, and Y. Yanase

  Proceedings of the National Academy of Sciences of the United States of America 119(49) e2209549119-1-e2209549119-6 2022年11月 査読有り責任著者
• Evolution of the electronic structure and correlations accompanied by suppression of itinerant ferromagnetism in Sr1−x(La0.5K0.5)xRuO3

  Ikuto Kawasaki, Shin-ichi Fujimori, Yukiharu Takeda, Hiroshi Yamagami, Rahmanto, Yutoku Honma, Kensuke Matsuoka, and Makoto Yokoyama

  Physical Review B 105(19) 195122-1-195122-8 2022年5月 査読有り最終著者
• Nature of field-induced antiferromagnetic order in Zn-doped CeCoIn5 and its connection to quantum criticality in the pure compound

  M. Yokoyama, Y. Honma, Y. Oshima, Rahmanto, K. Suzuki, K. Tenya, Y. Shimizu, D. Aoki, A. Matsuo, K. Kindo …

  Physical Review B 105 054515-1-054515-9 2022年2月 査読有り筆頭著者責任著者
• Nanoscale heterogeneity induced by nonmagnetic Zn dopants in the quantum critical metal CeCoIn5: 115In NQR/NMR and 59Co NMR study

  H. Sakai, Y. Tokunaga, S. Kambe, J.-X. Zhu, F. Ronning, J. D. Thompson, S. K. Ramakrishna, A. P. Reyes, K. Suzuki, Y. Oshima …

  Physical Review B 104(8) 085106-1-085106-12 2021年8月 査読有り最終著者
• Strong magnetic anisotropy and unusual magnetic field reinforced phase in URhSn with a quasi-kagome structure

  Y. Shimizu, A. Miyake, A. Maurya, F. Honda, A. Nakamura, Y. J. Sato, D. Li, Y. Homma, M. Yokoyama, Y. Tokunaga …

  Physical Review B 102(13) 134411-1-134411-11 2020年10月 査読有り
• Avoided quantum criticality and cluster-glass formation in itinerant ferromagnet Sr1-x(La0.5K0.5)xRuO3

  R. Iwahara, R. Sugawara, Rahmanto, Y. Honma, K. Matsuoka, A. Matsuo, K. Kindo, K. Tenya, M. Yokoyama

  Physical Review Materials 4 074404-1-074404-8 2020年7月 査読有り最終著者責任著者
• Anisotropic magnetic-field response of quantum critical fluctuations in Ni-doped CeCoIn5

  M. Yokoyama, K. Suzuki, K. Tenya, S. Nakamura, Y. Kono, S. Kittaka, T. Sakakibara

  Physical Review B 99 054506-1-054506-6 2019年 査読有り筆頭著者責任著者
• Observation of a new field-induced phase transition and its concomitant quantum critical fluctuations in CeCo(In1-xZnx)5

  M. Yokoyama, H. Mashiko, R. Otaka, Y. Oshima, K. Suzuki, K. Tenya, Y. Shimizu, A. Nakamura, D. Aoki, A. Kondo …

  Physical Review B 95(22) 224425-1-224425-5 2017年 査読有り筆頭著者責任著者
• Correlation effect in Sr1-xLaxRuO3 studied by soft x-ray photoemission spectroscopy

  I. Kawasaki, Y. Sakon, S.-i. Fujimori, H. Yamagami, K. Tenya, and M. Yokoyama

  Physical Review B 94(17) 174427-1-174427-7 2016年11月 査読有り最終著者責任著者
• Superconductivity and non-Fermi-liquid behavior in the heavy-fermion compound CeCo$_{1-x}$Ni$_x$In$_5$

  Ryo Otaka, Makoto Yokoyama, Hiroaki Mashiko, Takeshi Hasegawa, Yusei Shimizu, Yoichi Ikeda, Kenichi Tenya, Shota Nakamura, Daichi Ueta, Hideki Yoshizawa …

  Journal of the Physical Society of Japan 85 094713-1-094713-7 2016年7月29日 査読有り責任著者
• Muon Spin Relaxation and Neutron Diffraction Studies of Cluster-Glass States in Sr1-xLaxRuO3

  I. Kawasaki, K. Fujimura, I. Watanabe, M. Avdeev, K. Tenya and M. Yokoyama

  Journal of the Physical Society of Japan 85(5) 054701-1-054701-8 2016年 査読有り最終著者責任著者
• Enhancement of ferromagnetism by oxygen isotope substitution in strontium ruthenate SrRuO3

  H. Kawanaka, Y. Aiura, T. Hasebe, M. Yokoyama, T. Masui, Y. Nishihara, and T. Yanagisawa

  Scientific Reports 6 35150-1-35150-6 2016年 査読有り
• Pauli-limited superconductivity and antiferromagnetism in the heavy-fermion compound CeCo(In1-xZnx)5

  M. Yokoyama, H. Mashiko, R. Otaka, Y. Sakon, K. Fujimura, K. Tenya, A. Kondo, K. Kindo, Y. Ikeda, H. Yoshizawa …

  Physical Review B 92(18) 184509-1-184509-9 2015年 査読有り筆頭著者責任著者