Microwave response of V3Si single crystals:: Evidence for two-gap superconductivity

被引：33

作者：

Nefyodov, YA ^{[1
]}

Shuvaev, AM ^{[1
]}

Trunin, MR ^{[1
]}

机构：

[1] Inst Solid State Phys, Chernogolovka 142432, Moscow Dist, Russia

来源：

EUROPHYSICS LETTERS | 2005年 / 72卷 / 04期

关键词：

D O I：

10.1209/epl/i2005-10269-9

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The investigation of the temperature dependences of microwave surface impedance and complex conductivity of V3Si single crystals with different stoichiometry allowed to observe a number of peculiarities which are in remarkable contradiction with single-gap Bardeen-Cooper-Schrieffer theory. At the same time, they can be well described by the two-band model of superconductivity, thus strongly evidencing the existence of two distinct energy gaps with zero-temperature values Delta(1) approximate to 1.8 T-c and Delta(2) approximate to 0.95 T-c in V3Si.

引用

页码：638 / 644

页数：7

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