Far-infrared signature of the superconducting gap in intercalated graphite CaC6
arXiv:0804.2606 · doi:10.1103/PhysRevB.78.041404
Abstract
Terahertz reflectance spectra of the Ca-intercalated graphite CaC6 reveal a superconducting gap below 11K. The gap signature lacks a sharp onset to full reflectivity at 2Delta, but rather shows a distribution of gap values consistent with an anisotropic gap. The experimental data were successfully fitted to the gap distribution obtained from density functional calculations by Sanna et al. (Phys.Rev. B75, 020511, 2007). The temperature dependence of the superconducting gap is characteristic for a BCS type superconductor.
References in corpus (8)
- Superconductivity in Heavy Alkaline-Earths Intercalated Graphites
- Scanning Tunneling Spectroscopy on the novel superconductor CaC6
- Specific Heat of the Ca-Intercalated Graphite Superconductor CaC
- Possibility of superconductivity in graphite intercalated with alkaline earths investigated with density functional theory
- Evidence for gap anisotropy in CaC6 from directional point-contact spectroscopy
- Unresolved problems in superconductivity of CaC6
- Evidence of Strong-Coupled Superconductivity in CaC6 from Tunneling Spectroscopy
- Electron Spin Dynamics of the Superconductor CaC6 probed by ESR
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- Superconductivity in intercalated group-IV honeycomb structures
- Raman scattering from the CaC6 superconductor in the presence of disorder
- Signatures of superconducting gap inhomogeneities in optical properties