Tunneling spectroscopy of MgB2 and Li0.5(THF)yHfNCl

被引：39

作者：

Ekino, T ^{[1
]}

Takasaki, T

Muranaka, T

Fujii, H

Akimitsu, J

Yamanaka, S

机构：

[1] Hiroshima Univ, Fac Integrated Arts & Sci, Higashihiroshima 7398521, Japan

[2] Hiroshima Univ, Grad Sch Adv Sci Matter, Higashihiroshima 7398530, Japan

[3] Aoyama Gakuin Univ, Dept Phys, Tokyo 1578572, Japan

[4] Hiroshima Univ, Grad Sch Engn, Higashihiroshima 7398527, Japan

来源：

PHYSICA B-CONDENSED MATTER | 2003年 / 328卷 / 1-2期

关键词：

superconductivity; tunneling; break junction; energy gap; MgB2; Li-x(THF)(y)HfNCl;

D O I：

10.1016/S0921-4526(02)01801-X

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Break-junction tunneling spectra have been measured on MgB2 and Li-0.5(THF)(y) HfNCl to investigate the nature,of the superconducting gap. The observed largest gap values at 4 K are 2Delta = 18-20 and 11-12 meV for MgB2 (T-c = 39 K) and Li-0.5(THF)(y)HfNCl (26 K), respectively. These values lead to the similar ratio 2Delta/k(B)T(c) = 5-6, which is extremely large in comparison with that of the conventional strong-coupling superconductors. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：23 / 25

页数：3

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