Infrared Vortex-State Electrodynamics in Type-II Superconducting Thin Films

Xiaoxiang Xi; J. -H. Park; D. Graf; G. L. Carr; D. B. Tanner

doi:10.1103/PhysRevB.87.184503

Infrared Vortex-State Electrodynamics in Type-II Superconducting Thin Films

Superconductivity 2013-05-14 v1

Authors: Xiaoxiang Xi , J. -H. Park , D. Graf , G. L. Carr , D. B. Tanner

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Abstract

The vortex-state electrodynamics of s-wave superconductors has been studied by infrared spectroscopy. Far-infrared transmission and reflection spectra of superconducting NbTiN and NbN thin films were measured in a magnetic field perpendicular to the film surface, and the optical conductivity was extracted. The data show clear reduction of superconducting signature. We consider the vortex state as a two-component effective medium of normal cores embedded in a BCS superconductor. The spectral features are well explained by the Maxwell-Garnett theory. Our analysis supports the presence of magnetic-field-induced pair-breaking effects in the superconducting component outside of the vortex cores.

Keywords

vortex matter in superconductors vortex physics in superconductors superconductivity

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@article{arxiv.1304.0826,
  title  = {Infrared Vortex-State Electrodynamics in Type-II Superconducting Thin Films},
  author = {Xiaoxiang Xi and J. -H. Park and D. Graf and G. L. Carr and D. B. Tanner},
  journal= {arXiv preprint arXiv:1304.0826},
  year   = {2013}
}

Infrared Vortex-State Electrodynamics in Type-II Superconducting Thin Films

Abstract

Keywords

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