橋本顕一郎　Kenichiro Hashimoto

     名前(Name)  e-mail*  tel**  room
 助教
Assistant Professor		 橋本　顕一郎
Kenichiro Hashimoto
  hashimoto  2028  1-304

* @imr.tohoku.ac.jpを後ろに付けてください．

** +81-(0)22-215-****

略歴


1983年6月 京都府生まれ
2002年3月 奈良県私立 東大寺学園高等学校 卒業
2003年4月 京都大学 理学部 入学
2007年3月 京都大学 理学部 物理学科 卒業
2009年3月 京都大学大学院 理学研究科 物理学・宇宙物理学専攻 修士課程 修了
2009年4月 同大学院 博士後期課程 進学 日本学術振興会特別研究員(DC1)
2012年3月 同大学院 博士後期課程 修了
　　　　　　　博士(理学)取得 　博士論文題目 "Non-universal superconducting gap structure in iron-pnictides revealed by magnetic penetration depth measurements"
2012年4月 東北大学 金属材料研究所 低温電子物性学研究部門 佐々木研究室 助教
現在に至る

専門：固体電子物性学。特に強相関電子系化合物において、スピン-電荷-格子-軌道が複雑に絡み合った結果生じる特異な量子状態の実験的解明を目指している。具体的には、磁気秩序や電荷秩序、異方的超伝導など。

代表的な論文


有機導体に関する論文
  1. Quantum-disordered state of magnetic and electric dipoles in an organic Mott system
    M. Shimozawa*, K. Hashimoto*, A. Ueda, Y. Suzuki, K. Sugii, S. Yamada, Y. Imai, R. Kobayashi, K. Itoh, S. Iguchi, M. Naka, S. Ishihara, H. Mori, T. Sasaki, and M. Yamashita (*These authors contributed equally to this work)
    Nature Communications 8, 1821 (2017).

  2. Crystallization and vitrification of electrons in a glass-forming charge liquid
    S. Sasaki*, K. Hashimoto*, R. Kobayashi, K. Itoh, S. Iguchi, Y. Nishio, Y. Ikemoto, T. Moriwaki, N. Yoneyama, M. Watanabe, A. Ueda, H. Mori, K. Kobayashi, R. Kumai, Y. Murakami, J. Muller, and T. Sasaki (*These authors contributed equally to this work)
    Science 357, 1821 (2017).

  3. Dimer-Mott and charge-ordered insulating states in the quasi-one-dimensional organic conductors delta'P and delta'C-(BPDT-TTF)2ICl2
    R. Kobayashi, K. Hashimoto, N. Yoneyama, K. Yoshimi, Y. Motoyama, S. Iguchi, Y. Ikemoto, T. Moriwaki, H. Taniguchi, and T. Sasaki
    Phys. Rev. B 96, 115112 (2017).

  4. Emergence of charge degrees of freedom under high pressure in the organic dimer-Mott insulator beta'-(BEDT-TTF)2ICl2
    K. Hashimoto, R. Kobayashi, H. Okamura, H. Taniguchi, Y. Ikemoto, T. Moriwaki, S. Iguchi, M. Naka, S. Ishihara and T. Sasaki
    Phys. Rev. B 92, 085149 (2015).

  5. Collective excitation of a short-range charge ordering in theta-(BEDT-TTF)2CsZn(SCN)4
    K. Hashimoto, S. C. Zhan, R. Kobayashi, S. Iguchi, N. Yoneyama, T. Moriwaki, Y. Ikemoto, and T. Sasaki
    Phys. Rev. B 89, 085107 (2014).


量子臨界性に関する論文
  1. Anomalous superfluid density in quantum critical superconductors
    K. Hashimoto, Y. Mizukami, R. Katsumata, H. Shishido, M. Yamashita, H. Ikeda, Y. Matsud, J. A. Schlueter, J. D. Fletcher, A. Carrington, D. Gnida, D. Kaczorowski, and T. Shibauchi
    PNAS 110, 3293-3297 (2013).

  2. A Sharp Peak of the Zero-Temperature Penetration Depth at Optimal Composition in BaFe2(As1-xPx)2
    K. Hashimoto, K. Cho, T. Shibauchi, S. Kasahara, Y. Mizukami, R. Katsumata, Y. Tsuruhara, T. Terashima, H. Ikeda, M. A. Tanatar, H. Kitano, N. Salovich, R. W. Giannetta, P. Walmsley, A. Carrington, R. Prozorov, and Y. Matsuda
    Science 336, 1554-1557 (2012).


鉄系超伝導体に関する論文
  1. Disorder-induced topological change of the superconducting gap structure in iron pnictides
    Y. Mizukami, M. Konczykowski, Y. Kawamoto, S. Kurata, S. Kasahara, K. Hashimoto, V. Mishra, A. Kreisel, Y. Wang, P. J. Hirschfeld, Y. Matsuda, and T. Shibauchi
    Nature Communications 5, 5657 (2014).

  2. Electronic nematicity above the structural and superconducting transition in BaFe2(As1-xPx)2
    S. Kasahara, H. J. Shi, K. Hashimoto, S. Tonegawa, Y. Mizukami, T. Shibauchi, K. Sugimoto, T. Fukuda, T. Terashima, Andriy H. Nevidomskyy, and Y. Matsuda
    Nature 486, 382-385 (2012).

  3. Octet-Line Node Structure of Superconducting Order Parameter in KFe2As2
    K. Okazaki, Y. Ota, Y. Kotani, W. Malaeb, Y. Ishida, T. Shimojima, T. Kiss, S. Watanabe, C.-T. Chen, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, T. Saito, H. Fukazawa, Y. Kohori, K. Hashimoto, T. Shibauchi, Y. Matsuda, H. Ikeda, H. Miyahara, R. Arita, A. Chainani, and S. Shin
    Science 337, 1314-1317 (2012).

  4. Nodal versus nodeless order parameters in LiFeP and LiFeAs superconductors
    K. Hashimoto, S. Kasahara, R. Katsumata, Y. Mizukami, M. Yamashita, H. Ikeda, T. Terashima, A. Carrington, Y. Matsuda, and T. Shibauch
    Phys. Rev. Lett. 108, 047003 (2012).

  5. Evidence for Superconducting Gap Nodes in the Zone-Centered Hole Bands of KFe2As2 from Magnetic Penetration-Depth Measurements
    K. Hashimoto, A. Serafin, S. Tonegawa, R. Katsumata, R. Okazaki, T. Saito, H. Fukazawa, Y. Kohori, K. Kihou, C. H. Lee, A. Iyo, H. Eisaki, H. Ikeda, Y. Matsuda, A. Carrington, and T. Shibauchi
    Phys. Rev. B 82, 014526 (2010).

  6. Evolution from Non-Fermi- to Fermi-Liquid Transport via Isovalent Doping in BaFe2(As1-xPx)2 Superconductors
    S. Kasahara, T. Shibauchi, K. Hashimoto, K. Ikada, S. Tonegawa, H. Ikeda, H. Takeya, K. Hirata, T. Terashima, and Y. Matsuda
    Phys. Rev. B 81, 184519 (2010).

  7. Line Nodes in the Energy Gap of Superconducting BaFe2(As1-xPx)2
    K. Hashimoto, M. Yamashita, S. Kasahara, Y. Senshu, N. Nakata, S. Tonegawa, K. Ikada, A. Serafin, A. Carrington, T. Terashima, H. Ikeda, T. Shibauchi, and Y. Matsuda
    Phys. Rev. B 81, 220501(R) (2010).

  8. Microwave Surface-Impedance Measurements of the Magnetic Penetration Depth in Single Crystal Ba1-xKxFe2As2 Superconductors: Evidence for a Disorder-Dependent Superfluid Density
    K. Hashimoto, T. Shibauchi, S. Kasahara, K. Ikada, S. Tonegawa, T. Kato, R. Okazaki, C. J. van der Beek, M. Konczykowski, H. Takeya, K. Hirata, T. Terashima, and Y. Matsuda
    Phys. Rev. Lett. 102, 207001 (2009).

  9. Microwave Penetration Depth and Quasiparticle Conductivity of PrFeAsO1-y Single Crystals: Evidence for a Full-Gap Superconductor
    K. Hashimoto, T. Shibauchi, T. Kato, R. Okazaki, H. Shishido, M. Ishikado, H. Kito, A. Iyo, H. Eisaki, S. Shamoto, and Y. Matsuda
    Phys. Rev. Lett. 102, 017002 (2009).


重い電子系化合物に関する論文
  1. Cyclotron resonance study of quasiparticle mass and scattering rate in the hidden-order and superconducting phases of URu2Si2
    S. Tonegawa, K. Hashimoto, K. Ikada, Y. Tsuruhara, Y.-H. Lin, H. Shishido, Y. Haga, T. D. Matsuda, E. Yamamoto, Y. Onuki, H. Ikeda, Y. Matsuda, and T. Shibauchi
    Phys. Rev. B 88, 245131 (2013).

  2. Cyclotron Resonance in the Hidden-Order Phase of URu2Si2
    S. Tonegawa, K. Hashimoto, K. Ikada, Y.-H. Lin, H. Shishido, Y. Haga, T. D. Matsuda, E. Yamamoto, Y. Onuki, H. Ikeda, Y. Matsuda, and T. Shibauchi
    Phys. Rev. Lett. 109, 036401 (2012).

  3. Possible Phase Transition Deep Inside the Hidden Order Phase of Ultraclean URu2Si2
    H. Shishido, K. Hashimoto, T. Shibauchi, T. Sasaki, H. Oizumi, N. Kobayashi, T. Takamasu, K. Takehana, Y. Imanaka, T. D. Matsuda, Y. Haga, Y. Onuki, and Y. Matsuda
    Phys. Rev. Lett. 102, 156403 (2009).