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

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number174509
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume91
Issue number17
DOIs
Publication statusPublished - May 11 2015
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Fingerprint

Dive into the research topics of 'Optical conductivity evidence of clean-limit superconductivity in LiFeAs'. Together they form a unique fingerprint.

Cite this