Magnetic field dependence of the low-temperature specific heat of the borocarbide superconductor LuNi2B2C

被引：93

作者：

Nohara, M

Isshiki, M

Takagi, H

Cava, RJ

机构：

[1] PRINCETON UNIV, DEPT CHEM, PRINCETON, NJ 08540 USA

[2] PRINCETON UNIV, MAT INST, PRINCETON, NJ 08540 USA

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1997年 / 66卷 / 07期

关键词：

borocarbide superconductors; LuNi2B2C; specific heat; quasiparticle states;

D O I：

10.1143/JPSJ.66.1888

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The low temperature specific heat of the borocarbide superconductor LuNi2B2C was measured under various magnetic fields (H) up to 8 T. The coefficient of the T-linear term in specific heat in the mixed state shows marked deviations from the H-linear dependence expected for conventional superconductors and is found to obey a root H dependence. A good description of the data can be obtained by assuming the presence of a zero-gap region along lines on the Fermi surface, indicating the possibility of unconventional pairing in the superconducting state of the borocarbides.

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页码：1888 / 1891

页数：4

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