Electronic correlations and unusual superconducting response in the optical properties of the iron chalcogenide FeTe0.55Se0.45

@inproceedings{Homes2010ElectronicCA,
  title={Electronic correlations and unusual superconducting response in the optical properties of the iron chalcogenide FeTe0.55Se0.45},
  author={C. C. Homes and Ana Akrap and Jin Sheng Wen and Z. J. Xu and Zhi Wei Lin and Qiang Li and Genda Gu},
  year={2010}
}
The in-plane complex optical properties of the iron-chalcogenide superconductor FeTe{sub 0.55}Se{sub 0.45} have been determined above and below the critical temperature T{sub c} = 14 K. At room temperature the conductivity is described by a weakly interacting Fermi liquid; however, below 100 K the scattering rate develops a frequency dependence in the terahertz region, signaling the increasingly correlated nature of this material. We estimate the dc conductivity {sigma}{sub dc}(T {ge} T{sub c… CONTINUE READING