Evidence of point nodes in superconducting gap of borocarbide superconductor YNi2B2C

被引：2
|
作者：
Kamata, K
Izawa, K
Nakajima, Y
Matsuda, Y
Watanabe, T
Nohara, M
Takagi, H
Takeya, H
Hirata, K
Thalmeier, P
Maki, K
机构：
[1] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan
[2] Univ Tokyo, Dept Appl Chem, Bunkyo Ku, Tokyo 113865, Japan
[3] Univ Tokyo, Dept Adv Mat Sci, Bunkyo Ku, Tokyo 1130033, Japan
[4] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
[5] Max Planck Inst Chem Phys Solid, D-01187 Dresden, Germany
[6] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2003年 / 388卷
关键词：
borocarbides; superconducting gap structure; thermal conductivity;
D O I：
10.1016/S0921-4534(02)02719-3
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
In order to determine the superconducting gap structure of the borocarbide superconductor YNi2B2C, we have measured the angular variation of the c-axis thermal conductivity kappa(zz) in magnetic field rotated within the ab-planes. A clear fourfold symmetry with narrow cusps was observed in the angular variation of kappa(zz). These results provide a strong evidence that the gap function has point nodes which are located along the a- and b-axes of the crystal. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：185 / 186
页数：2
相关论文
共 50 条
  • [41] Electronic structure and Fermi surface of the quaternary intermetallic borocarbide superconductor YNi2B2C from 2D-ACAR
    Hamid, AS
    INTERNATIONAL JOURNAL OF MODERN PHYSICS B, 2003, 17 (31-32): : 5973 - 5982
  • [42] Study of local structure of YNi2B2C superconductor by EXAFS
    Ju, X
    Su, YX
    Wang, YB
    Tao, Y
    Wei, L
    PHYSICA C, 1997, 282 : 725 - 726
  • [43] The photoemission study of intermetallic compound superconductor YNi2B2C
    Wang, JS
    Zhang, XJ
    Ruan, YH
    Jiao, ZK
    Zhang, QR
    Fan, CY
    Zhang, XS
    Su, YJ
    Cao, GH
    PHYSICA C, 1997, 282 : 1935 - 1936
  • [44] Magnetoquantum oscillations in the normal and superconducting state of YNi2B2C
    Goll, G
    Nguyen, L
    Steep, E
    Jansen, AGM
    Wyder, P
    Winzer, K
    PHYSICA B, 1997, 230 : 868 - 871
  • [45] Superconducting properties of chill-cast YNi2B2C
    Zhou, XZ
    Kunkel, HP
    Stampe, PA
    Cowen, JA
    Williams, G
    PHYSICA B, 1998, 246 : 425 - 428
  • [46] Magnetoquantum oscillations in the normal and superconducting state of YNi2B2C
    Goll, G.
    Nguyen, L.
    Steep, E.
    Jansen, A.G.M.
    Wyder, P.
    Winzer, K.
    Physica B: Condensed Matter, 230-232 : 868 - 871
  • [47] Anomalous magnetoresistance of YNi2B2C superconducting single crystals
    Chu, RK
    Chu, WK
    Chen, Q
    Zhang, ZH
    Miller, JH
    JOURNAL OF PHYSICS-CONDENSED MATTER, 2000, 12 (03) : 275 - 282
  • [48] Precursor diamagnetism above the superconducting transition in YNi2B2C
    Lascialfari, A
    Mishonov, T
    Rigamonti, A
    Zucca, I
    Behr, G
    Loser, W
    Drechsler, SL
    EUROPEAN PHYSICAL JOURNAL B, 2003, 35 (03): : 325 - 329
  • [49] Superconducting properties of Fe-doped YNi2B2C
    Zhou, XZ
    Kunkel, HP
    Stampe, PA
    Williams, G
    JOURNAL OF APPLIED PHYSICS, 1996, 79 (08) : 6561 - 6563
  • [50] Superconducting properties of chill-cast YNi2B2C
    Zhou, X.Z.
    Kunkel, H.P.
    Stampe, P.A.
    Cowen, J.A.
    Williams, Gwyn
    Physica B: Condensed Matter, 1998, 246-247 : 425 - 428
12345