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
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