Optical Conductivity Evidence of Clean-Limit Superconductivity in LiFeAs
| Autor: | Takasada Shibauchi, Shigeru Kasahara, Yuji Matsuda, A. V. Pronin, G. Chanda, Ricardo P. S. M. Lobo, J. Wosnitza |
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| Rok vydání: | 2015 |
| Předmět: |
Superconductivity
Physics Condensed matter physics Condensed Matter - Superconductivity FOS: Physical sciences Condensed Matter Physics Optical conductivity Electronic Optical and Magnetic Materials Superconductivity (cond-mat.supr-con) Scattering rate Quantum critical point Condensed Matter::Superconductivity Quasiparticle Penetration depth Parametrization Spin-½ |
| Zdroj: | Physical Review B 91(2015), 174509 |
| DOI: | 10.48550/arxiv.1504.06791 |
| Popis: | 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. Comment: 6 pages - 4 Figures |
| Databáze: | OpenAIRE |
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