Anisotropic superconducting gap in CeCo2 - Specific heat studies

被引：7

作者：

Aoki, Y

Nishigaki, T

Sugawara, H

Sato, H

机构：

[1] Department of Physics, Faculty of Science, Tokyo Metropolitan University, Hachioji-shi

来源：

PHYSICA B | 1997年 / 237卷

关键词：

CeCo2; superconductivity; anisotropic gap; stoner enhancement; specific heat;

D O I：

10.1016/S0921-4526(97)00181-6

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We found a clear evidence of anisotropic superconducting gap in the low-temperature specific heat of high-quality CeCo2 single crystals. The electronic specific-heat jump at T-C is reduced (Delta C-c/gamma T-C = 0.85) compared to the BCS value of 1.43 and C-e varies approximately as T-2 at low temperatures of T much less than T-C.

引用

收藏

页码：302 / 303

页数：2

相关论文

共 7 条

[1] EFFECTS OF ENERGY GAP ANISOTROPY IN PURE SUPERCONDUCTORS [J].

CLEM, JR .

ANNALS OF PHYSICS, 1966, 40 (02) :268-+

[2] 4F-BAND MAGNETISM IN CEFE2 [J].

ERIKSSON, O ;

NORDSTROM, L ;

BROOKS, MSS ;

JOHANSSON, B .

PHYSICAL REVIEW LETTERS, 1988, 60 (24) :2523-2526

[3] NUCLEAR MAGNETIC-RELAXATION IN THE HEAVY ELECTRON SUPERCONDUCTOR CECU2SI2 [J].

KITAOKA, Y ;

UEDA, K ;

KOHARA, T ;

ASAYAMA, K ;

ONUKI, Y ;

KOMATSUBARA, T .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1985, 52 (1-4) :341-343

[4] SUPERCONDUCTIVITY OF PHASE CECO2 AT ZERO AND HIGH PRESSURE [J].

LUO, HL ;

MAPLE, MB ;

HARRIS, IR ;

SMITH, TF .

PHYSICS LETTERS A, 1968, A 27 (08) :519-&

[5] Fermi surface properties in CeCo2 [J].

Sugawara, H ;

Higuchi, M ;

Inoue, O ;

Nishigaki, T ;

Aoki, Y ;

Sato, H ;

Settai, R ;

Onuki, Y ;

Hasegawa, A .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1996, 65 (06) :1744-1750

[6] SUPERCONDUCTING PROPERTIES AND DE HAAS-VAN-ALPHEN EFFECT IN CECO2 SINGLE-CRYSTAL [J].

SUGAWARA, H ;

INOUE, O ;

KOBAYASHI, Y ;

SATO, H ;

NISHIGAKI, T ;

AOKI, Y ;

SATO, H ;

SETTAI, R ;

ONUKI, Y .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1995, 64 (10) :3639-3642

[7] SOLUTION OF GAP EQUATION FOR PB HG AND AL [J].

SWIHART, JC ;

SCALAPINO, DJ ;

WADA, Y .

PHYSICAL REVIEW LETTERS, 1965, 14 (04) :106-+