Optical conductivity evidence of clean-limit superconductivity in LiFeAs

R. P.S.M. Lobo, G. Chanda, A. V. Pronin, J. Wosnitza, S. Kasahara, T. Shibauchi, Y. Matsuda

研究成果査読

7 被引用数 (Scopus)

抄録

We measured the optical conductivity of superconducting LiFeAs. In the superconducting state, the formation of the condensate leads to a spectral-weight loss and yields a penetration depth of 225 nm. No sharp signature of the superconducting gap is observed. This suggests that the system is likely in the clean limit. A Drude-Lorentz parametrization of the data in the normal state reveals a quasiparticle scattering rate supportive of spin fluctuations and proximity to a quantum critical point.

本文言語English
論文番号174509
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
91
17
DOI
出版ステータスPublished - 5月 11 2015
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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