Microwave Response of V3Si Single Crystals: Evidence for Two-Gap Superconductivity

Yu. A. Nefyodov; A. M. Shuvaev; M. R. Trunin

doi:10.1209/epl/i2005-10269-9

Microwave Response of V3Si Single Crystals: Evidence for Two-Gap Superconductivity

Superconductivity 2007-05-23 v1

Authors: Yu. A. Nefyodov , A. M. Shuvaev , M. R. Trunin

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Abstract

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 two-band model of superconductivity, thus strongly evidencing the existence of two distinct energy gaps with zero-temperature values Delta1~1.8Tc and Delta2~0.95Tc in V3Si.

Keywords

microwave response two-gap superconductivity V3Si surface impedance complex conductivity

Cite

@article{arxiv.cond-mat/0509244,
  title  = {Microwave Response of V3Si Single Crystals: Evidence for Two-Gap Superconductivity},
  author = {Yu. A. Nefyodov and A. M. Shuvaev and M. R. Trunin},
  journal= {arXiv preprint arXiv:cond-mat/0509244},
  year   = {2007}
}

Comments

Submitted to Europhysics Letters

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