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
收藏
页码：638 / 644
页数：7
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