Staff

     Name  e-mail*  tel  room
 Assistant Professor  
 Kenichiro Hashimoto
 hashimoto  2028   1-304

put (e-mail*) before @imr.tohoku.ac.jp

CV


June, 1983 Born in Kyoto, Japan

Educational Qualification
March 2012: Ph.D. from Department of Physics, Kyoto University
March 2009: M.A. from Department of Physics, Kyoto University
March 2007: B.A. from Department of Physics, Kyoto University

Research Experience
2012-present: Assistant Professor, Tohoku University, Japan
2009-2012: Research Fellow of the Japan Society for the Promotion of Science (DC1), Kyoto University, Japan

Research Interests
Experimental research on condensed matter physics, especially superconductivity and magnetism in strongly correlated electron systems

Selected publications

Oraganics
  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, 1381-1385 (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).


Quantum criticality
  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).


Iron-based superconductors
  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).


Heavy fermions
  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).