Abstract
The in-plane complex optical properties of the iron-chalcogenide superconductor have been determined above and below the critical temperature . 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 and the superfluid density , which places this material close to the scaling line for a BCS dirty-limit superconductor. Below the optical conductivity reveals two gap features at and 5.1 meV.
- Received 22 February 2010
- Corrected 18 May 2010
DOI:https://doi.org/10.1103/PhysRevB.81.180508
©2010 American Physical Society
Corrections
18 May 2010