論文

  1. Imaging Quantum Interference in a Monolayer Kitaev Quantum Spin Liquid Candidate
    Y. Kohsaka, S. Akutagawa, S. Omachi, Y. Iwamichi, T. Ono, I. Tanaka, S. Tateishi, H. Murayama, S. Suetsugu, K. Hashimoto, T. Shibauchi, M. O. Takahashi, M. G. Yamada, S. Nikolaev, T. Mizushima, S. Fujimoto, T. Terashima, T. Asaba, Y. Kasahara, Y. Matsuda
    Phys. Rev. X 14, 041026 (2024-10-25) doi: 10.1103/PhysRevX.14.041026
    プレスリリース: 絶縁体単層膜における未知の波紋の可視化に成功―量子スピン液体の痕跡？―

  1. Emergent Spin-Gapped Magnetization Plateaus in a Spin-1/2 Perfect Kagome Antiferromagnet
    S. Suetsugu, T. Asaba, Y. Kasahara, Y. Kohsaka, K. Totsuka, B. Li, Y. Zhao, Y. Li, M. Tokunaga, Y. Matsuda
    Phys. Rev. Lett. 132, 226701 (2024-05-28) doi:10.1103/PhysRevLett.132.226701
  2. Evidence for a finite-momentum Cooper pair in tricolor d-wave superconducting superlattices
    T. Asaba, M. Naritsuka, H. Asaeda, Y. Kosuge, S. Ikemori, S. Suetsugu, Y. Kasahara, Y. Kohsaka, T. Terashima, A. Daido, Y. Yanase, Y. Matsuda
    Nat. Commun. 15, 3861 (2024-05-08) doi: 10.1038/s41467-024-47875-4
  3. Fully gapped pairing state in spin-triplet superconductor UTe2
    Shota Suetsugu; Masaki Shimomura; Masashi Kamimura; Tomoya Asaba; Hiroto Asaeda; Yuki Kosuge; Yuki Sekino; Shun Ikemori; Yuichi Kasahara; Yuhki Kohsaka, Minhyea Lee, Youichi Yanase, Hironori Sakai, Petr Opletal, Yoshifumi Tokiwa, Yoshinori Haga, Yuji Matsuda
    Sci. Adv. 10, eadk3772 (2024-02-09) doi: 10.1126/sciadv.adk3772
  4. Evidence for an odd-parity nematic phase above the charge-density-wave transition in a kagome metal
    T. Asaba, A. Onishi, Y. Kageyama, T. Kiyosue, K. Ohtsuka, S. Suetsugu, Y. Kohsaka, T. Gaggl, Y. Kasahara, H. Murayama, K. Hashimoto, R. Tazai, H. Kontani, B. R. Ortiz, S. D. Wilson, Q. Li , H. -H. Wen, T. Shibauchi, Y. Matsuda
    Nat. Phys. 20, 40 (2024-01-06) doi: 10.1038/s41567-023-02272-4
  5. Correlation-driven electronic nematicity in the Dirac semimetal BaNiS2
    Christopher John Butler, Yuhki Kohsaka, Youichi Yamakawa, Mohammad Saeed Bahramy, Seiichiro Onari, Hiroshi Kontani, Tetsuo Hanaguri, Shinichi Shamoto
    Proc. Natl. Acad. Sci. 119, e2212730119 (2022-12-02) doi: 10.1073/pnas.2212730119
  6. Superconductivity near the saddle point in the two-dimensional Rashba system Si(111)-√3 x √3-(Tl,Pb)
    T. Machida, Y. Yoshimura, T. Nakamura, Y. Kohsaka, T. Hanaguri, C. -R. Hsing, C. -M. Wei, Y. Hasegawa, S. Hasegawa, A. Takayama
    Phys. Rev. B. 105, 064507 (2022-02-11) doi: 10.1103/PhysRevB.105.064507
  7. Removing background and estimating a unit height of atomic steps from a scanning probe microscopy image using a statistical model
    Y. Kohsaka
    Rev. Sci. Instrum. 92, 033702 8 (2021-03-09) doi: 10.1063/5.0038852
  8. Zero-energy vortex bound state in the superconducting topological surface state of Fe(Se,Te)
    T. Machida, Y. Sun, S. Pyon, S. Takeda, Y. Kohsaka, T. Hanaguri, T. Sasagawa, T. Tamegai
    Nat. Mater., 18, 811, (2019-06-17) doi: 10.1038/S41563-019-0397-1
  9. A scanning tunneling microscope for spectroscopic imaging below 90 mK in magnetic fields up to 17.5 T
    Tadashi Machida, Yuhki Kohsaka, Tetsuo Hanaguri
    Rev. Sci. Instrum. 89, 093707 (2018-09-24) doi: 10.1063/1.5049619
  10. Two distinct superconducting pairing states divided by the nematic end point in FeSe1-xSx
    Tetsuo Hanaguri, Katsuya Iwaya, Yuhki Kohsaka, Tadashi Machida, Tatsuya Watashige, Shigeru Kasahara, Takasada Shibauchi, Yuji Matsuda
    Sci. Adv. 4, eaar6419 (2018-05-25) doi: 10.1126/sciadv.aar6419
  11. Full-gap superconductivity in spin-polarised surface states of topological semimetal β-PdBi2
    K. Iwaya, Y. Kohsaka, K. Okawa, T. Machida, M. S. Bahramy, T. Hanaguri, T. Sasagawa
    Nat. Commun. 8, 976 (2017-10-17) doi: 10.1038/s41467-017-01209-9
  12. Orbital-dependent quasiparticle scattering interference in 3R−NbS2
    T. Machida, Y. Kohsaka, K. Iwaya, R. Arita, T. Hanaguri, R. Suzuki, M. Ochi, Y. Iwasa
    Phys. Rev. B 96, 075206 (2017-08-21) doi: 10.1103/PhysRevB.96.075206
  13. Spin-orbit scattering visualized in quasiparticle interference
    Y. Kohsaka, T. Machida, K. Iwaya, M. Kanou, T. Hanaguri, T. Sasagawa
    Phys. Rev. B 95, 115307 (2017-03-15) doi: 10.1103/PhysRevB.95.115307
  14. Bipartite electronic superstructures in the vortex core of Bi2Sr2CaCu2O8+δ
    T. Machida, Y. Kohsaka, K. Matsuoka, K. Iwaya, T. Hanaguri, T. Tamegai
    Nat. Commum. 7, 11747 (2016-05-27) doi: 10.1038/ncomms11747
  15. Evidence for Time-Reversal Symmetry Breaking of the Superconducting State near Twin-Boundary Interfaces in FeSe Revealed by Scanning Tunneling Spectroscopy
    T. Watashige, Y. Tsutsumi, T. Hanaguri, Y. Kohsaka, S. Kasahara, A. Furusaki, M. Sigrist, C. Meingast, T. Wolf, H. v. Löhneysen, T. Shibauchi, Y. Matsuda
    Phys. Rev. X 5, 031022 (2015-08-21) doi: 10.1103/PhysRevX.5.031022
  16. Imaging ambipolar two-dimensional carriers induced by the spontaneous electric polarization of a polar semiconductor BiTeI
    Y. Kohsaka, M. Kanou, H. Takagi, T. Hanaguri, T. Sasagawa
    Phys. Rev. B 91, 245312 (2015-06-26) doi: 10.1103/PhysRevB.91.245312
  17. Field-induced superconducting phase of FeSe in the BCS-BEC cross-over
    Shigeru Kasahara, Tatsuya Watashige, Tetsuo Hanaguri, Yuhki Kohsaka, Takuya Yamashita, Yusuke Shimoyama, Yuta Mizukami, Ryota Endo, Hiroaki Ikeda, Kazushi Aoyama, Taichi Terashima, Shinya Uji, Thomas Wolf, Hilbert von Löhneysen, Takasada Shibauchi, Yuji Matsuda
    Proc. Natl. Acad. Sci. 111, 16309 (2014-11-06) doi: 10.1073/pnas.1413477111
  18. Direct phase-sensitive identification of a d-form factor density wave in underdoped cuprates
    Kazuhiro Fujita, Mohammad H. Hamidian, Stephen D. Edkins, Chung Koo Kim, Yuhki Kohsaka, Masaki Azuma, Mikio Takano, Hidenori Takagi, Hiroshi Eisaki, Shin-ichi Uchida, Andrea Allais, Michael J. Lawler, Eun-Ah Kim, Subir Sachdev, J. C. Séamus Davis
    Proc. Natl. Acad. Sci. 111, E3026 (2014-07-02) doi: 10.1073/pnas.1406297111
  19. Visualization of the emergence of the pseudogap state and the evolution to superconductivity in a lightly hole-doped Mott insulator
    Y. Kohsaka, T. Hanaguri, M. Azuma, M. Takano, J. C. Davis, H. Takagi
    Nat. Phys. 8, 534 (2012-05-20) doi: 10.1038/Nphys2321
  20. Intra-unit-cell electronic nematicity of the high-Tc copper-oxide pseudogap states
    M. J. Lawler, K. Fujita, Jhinhwan Lee, A. R. Schmidt, Y. Kohsaka, Chung Koo Kim, H. Eisaki, S. Uchida, J. C. Davis, J. P. Sethna, Eun-Ah Kim
    Nature 466, 347 (2010-07-15) doi: 10.1038/nature09169
  21. Coherence Factors in a High-Tc Cuprate Probed by Quasi-Particle Scattering Off Vortices
    T. Hanaguri, Y. Kohsaka, M. Ono, M. Maltseva, P. Coleman, I. Yamada, M. Azuma, M. Takano, K. Ohishi, H. Takagi
    Science 323, 923 (2009-02-13) doi: 10.1126/science.1166138
  22. How Cooper pairs vanish approaching the Mott insulator in Bi2Sr2CaCu2O8+δ
    Y. Kohsaka, C. Taylor, P. Wahl, A. Schmidt, Jhinhwan Lee, K. Fujita, J. W. Alldredge, K. McElroy, Jinho Lee, H. Eisaki, S. Uchida, D. -H. Lee, J. C. Davis
    Nature 454, 1072 (2008-08-28) doi: 10.1038/nature07243
  23. Evolution of the electronic excitation spectrum with strongly diminishing hole density in superconducting Bi2Sr2CaCu2O8+δ
    J. W. Alldredge, Jinho Lee, K. McElroy, M. Wang, K. Fujita, Y. Kohsaka, C. Taylor, H. Eisaki, S. Uchida, P. J. Hirschfeld, J. C. Davis
    Nat, Phys. 4, 319 (2008-03-23) doi: 10.1038/nphys917
  24. Quasiparticle interference and superconducting gap in Ca2−xNaxCuO2Cl2
    T. Hanaguri, Y. Kohsaka, J. C. Davis, C. Lupien, I. Yamada, M. Azuma, M. Takano, K. Ohishi, M. Ono, H. Takagi
    Nat. Phys. 3, 865 (2007-10-28) doi: 10.1038/nphys753
  25. Low-energy spectroscopic mapping studies in optimally-doped Ca2−xNaxCuO2Cl2
    T. Hanaguri, Y. Kohsaka, J. C. Séamus Davis, C. Lupien, I. Yamada, M. Azuma, M. Takano, K. Ohishi, H. Takagi
    Physica C 460-462, 954 (2007-04-03) doi: 10.1016/j.physc.2007.03.324
  26. An Intrinsic Bond-Centered Electronic Glass with Unidirectional Domains in Underdoped Cuprates
    Y. Kohsaka, C. Taylor, K. Fujita, A. Schmidt, C. Lupien, T. Hanaguri, M. Azuma, M. Takano, H. Eisaki, H. Takagi, S. Uchida, J. C. Davis
    Science 315, 1380 (2007-03-09) doi: 10.1126/science.1138584
  27. Angle-resolved photoemission studies of lattice polaron formation in the cuprate Ca2CuO2Cl2
    K. M. Shen, F. Ronning, W. Meevasana, D. H. Lu, N. J. C. Ingle, F. Baumberger, W. S. Lee, L. L. Miller, Y. Kohsaka, M. Azuma, M. Takano, H. Takagi, Z.-X. Shen
    Phys. Rev. B 75, 075115 (2007-02-22) doi: 10.1103/PhysRevB.75.075115
  28. Absence of long-ranged charge order in NaxCa2−xCuO2Cl2 (x=0.08)
    Serban Smadici, Peter Abbamonte, Munetaka Taguchi, Yuhki Kohsaka, Takao Sasagawa, Masaki Azuma, Mikio Takano, Hidenori Takagi
    Phys. Rev. B 75, 075104 (2007-02-08) doi: 10.1103/PhysRevB.75.075104
  29. Chemical potential shift in lightly doped to optimally doped Ca2-xNaxCuO2Cl2
    H. Yagi, T. Yoshida, A. Fujimori, Y. Kohsaka, M. Misawa, T. Sasagawa, H. Takagi, M. Azuma, M. Takano
    Phys. Rev. B 73, 172503 (2006-05-16) doi: 10.1103/PhysRevB.73.172503
  30. Nodal Quasiparticles and Antinodal Charge Ordering in Ca2-xNaxCuO2Cl2
    Kyle M. Shen, F. Ronning, D. H. Lu, F. Baumberger, N. J. C. Ingle, W. S. Lee, W. Meevasana, Y. Kohsaka, M. Azuma, M. Takano, H. Takagi, Z.-X. Shen
    Science 307, 901 (2005-02-11) doi: 10.1126/science.1103627
  31. Missing Quasiparticles and the Chemical Potential Puzzle in the Doping Evolution of the Cuprate Superconductors
    K. M. Shen, F. Ronning, D. H. Lu, W. S. Lee, N. J. C. Ingle, W. Meevasana, F. Baumberger, A. Damascelli, N. P. Armitage, L. L. Miller, Y. Kohsaka, M. Azuma, M. Takano, H. Takagi, Z. -X. Shen
    Phys. Rev. Lett. 93, 267002 (2004-12-20) doi: 10.1103/PhysRevLett.93.267002
  32. Evolution of local electronic states from a metal to a correlated insulator in a NiS2−xSex solid solution
    K. Iwaya, Y. Kohsaka, S. Satow, T. Hanaguri, S. Miyasaka, H. Takagi
    Phys. Rev. B 70, 161103 (2004-10-20) doi: 10.1103/PhysRevB.70.161103
  33. Charge dynamics of Ca2-xNaxCuO2Cl2 as a correlated electron system with the ideal tetragonal lattice
    K. Waku, T. Katsufuji, Y. Kohsaka, T. Sasagawa, H. Takagi, H. Kishida, H. Okamoto, M. Azuma, M. Takano
    Phys. Rev. B 70, 134501 (2004-10-07) doi: 10.1103/PhysRevB.70.134501
  34. Imaging Nanoscale Electronic Inhomogeneity in the Lightly Doped Mott Insulator Ca2-xNaxCuO2Cl2
    Y. Kohsaka, K. Iwaya, S. Satow, T. Hanaguri, M. Azuma, M. Takano, H. Takagi
    Phys. Rev. Lett. 93, 097004 (2004-08-27) doi: 10.1103/PhysRevLett.93.097004
  35. A ‘checkerboard’ electronic crystal state in lightly hole-doped Ca2-xNaxCuO2Cl2
    T. Hanaguri, C. Lupien, Y. Kohsaka, D. -H. Lee, M. Azuma, M. Takano, H. Takagi, J. C. Davis
    Nature 430, 1001 (2004-08-26) doi: 10.1038/nature02861
  36. STM/STS study of metal-to-Mott-insulator transitions
    T. Hanaguri, Y. Kohsaka, K. Iwaya, S. Satow, K. Kitazawa, H. Takagi, M. Azuma, M. Takano
    Physica C 408-410, 328 (2004-06-17) doi: 10.1016/j.physc.2004.02.133
  37. Fully gapped single-particle excitations in lightly doped cuprates
    K. M. Shen, T. Yoshida, D. H. Lu, F. Ronning, N. P. Armitage, W. S. Lee, X. J. Zhou, A. Damascelli, D. L. Feng, N. J. C. Ingle, H. Eisaki, Y. Kohsaka, H. Takagi, T. Kakeshita, S. Uchida, P. K. Mang, M. Greven, Y. Onose, Y. Taguchi, Y. Tokura, Seiki Komiya, Yoichi Ando, M. Azuma, M. Takano, A. Fujimori, Z. -X. Shen
    Phys. Rev. B 69, 054053 (2004-02-17) doi: 10.1103/PhysRevB.69.054503
  38. ARPES study on electronic evolution in Ca2-xNaxCuO2Cl2
    T. Sasagawa, F. Ronning, Y. Kohsaka, K. M. Shen, T. Yoshida, M. Azuma, M. Takano, Z. -X. Shen, H. Takagi
    Physica C 388-389, 307 (2003-05-14) doi: 10.1016/S0921-4534(02)02462-0
  39. Evolution of a metal to insulator transition in Ca2-xNaxCuO2Cl2 as seen by angle-resolved photoemission
    F. Ronning, T. Sasagawa, Y. Kohsaka, K. M. Shen, A. Damascelli, C. Kim, T. Yoshida, N. P. Armitage, D. H. Lu, D. L. Feng, L. L. Miller, H. Takagi, Z.-X. Shen
    Phys. Rev. B 67, 165101 (2003-04-02) doi: 10.1103/PhysRevB.67.165101
  40. Real Space Imaging of the Electronic States in Underdoped Ca2-xNaxCuO2Cl2 Single Crystals
    Y. Kohsaka, T. Hanaguri, K. Kitazawa, M. Azuma, M. Takano, H. Takagi
    J. Low Temp. Phys. 131, 299-303 (2003-05) doi: 10.1023/A:1022941506435
  41. Single Crystal Growth of Ca2-xNaxCuO2Cl2 and Related Compounds at High Pressures of Several GPa
    Masaki Azuma, Takashi Saito, Ikuya Yamada, Yuhki Kohsaka, Hidenori Takagi, Mikio Takano
    J. Low Temp. Phys. 131, 671 (2003-05) doi: 10.1023/A:1022904815038
  42. Angle-Resolved Photoemission Spectroscopy of (Ca,Na)2CuO2Cl2 Crystals: Fingerprints of a Magnetic Insulator in a Heavily Underdoped Superconductor
    Yuhki Kohsaka, Takao Sasagawa, Filip Ronning, Teppei Yoshida, Changyoung Kim, Tetsuo Hanaguri, Masaki Azuma, Mikio Takano, Zhi Xun Shen, Hidenori Takagi
    J. Phys. Soc. Jpn. 72, 1018 (2003-05) doi: 10.1143/JPSJ.72.1018
  43. Single crystal growth of transition metal oxides at high pressures of several GPa
    M. Azuma, T. Saito, S. Ishiwata, I. Yamada, Y. Kohsaka, H. Takagi, M. Takano
    Physica C 392-396, 22 (2003-03-28) doi: 10.1016/S0921-4534(03)00794-9
  44. STM/STS study on Ca2-xNaxCuO2Cl2 single crystals
    Y. Kohsaka, T. Hanaguri, K. Kitazawa, M. Azuma, M. Takano, H. Takagi
    Physica C 388-389, 283 (2003-03-16) doi: 10.1016/S0921-4534(02)02444-9
  45. Single-crystal growth of transition metal oxides at high pressures of several GPa
    Masaki Azuma, Takashi Saito, Shintaro Ishiwata, Hirofumi Yoshida, Mikio Takano, Yuhki Kohsaka, Hidenori Takagi, Wataru Utsumi
    J. Phys.: Condens. Matter14, 11321 (2002-10-25) doi: 10.1088/0953-8984/14/44/475
  46. Growth of Na-Doped Ca2CuO2Cl2 Single Crystals under High Pressures of Several GPa
    Yuhki Kohsaka, Masaki Azuma, Ikuya Yamada, Takao Sasagawa, Tetsuo Hanaguri, Mikio Takano, Hidenori Takagi
    J. Am. Chem. Soc. 124, 12275 (2002-09-19) doi: 10.1021/ja026680i

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