Optical properties of the iron-chalcogenide superconductor FeTe0.55Se0.45 |
| |
Authors: | Christopher C. Homes Ana Akrap Jinsheng Wen Zhijun Xu Zhi Wei Lin Qiang Li Genda Gu |
| |
Affiliation: | Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA |
| |
Abstract: | The complex optical properties of the iron-chalcogenide superconductor FeTe0.55Se0.45 with Tc=14 K have been examined over a wide frequency range for light polarized in the Fe-Te(Se) planes above and below Tc. At room temperature the optical response may be described by a weakly interacting Fermi liquid; however, just above Tc this picture breaks down and the scattering rate takes on a linear frequency dependence. Below Tc there is evidence for two gap features in the optical conductivity at and . Less than 20% of the free carriers collapse into the condensate for T?Tc, and this material is observed to fall on the universal scaling line for a BCS dirty-limit superconductor in the weak-coupling limit. |
| |
Keywords: | A. Chalcogenides C. Infrared spectroscopy D. Optical properties D. Superconductivity |
本文献已被 ScienceDirect 等数据库收录! |