2015年5月11日
Optical conductivity evidence of clean-limit superconductivity in LiFeAs
Physical Review B - Condensed Matter and Materials Physics
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- 巻
- 91
- 号
- 17
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevB.91.174509
- 出版者・発行元
- American Physical Society
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.
- ID情報
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- DOI : 10.1103/PhysRevB.91.174509
- ISSN : 1550-235X
- ISSN : 1098-0121
- SCOPUS ID : 84929601113