Thermal properties of MgB2: the effect of disorder on gap amplitudes and relaxation times of p and s bands
arXiv:cond-mat/0306137 · doi:10.1016/j.physc.2004.02.171
Abstract
We present thermal conductivity and specific heat measurements on MgB2 and Mg-AlB2 samples. Thermal properties have been analysed by using a two-gap model in order to estimate the gap amplitudes, D(0)p and D(0)s and the intra-band scattering rates, Gss and Gpp. As a function of Al doping and disorder D(0)s rapidly decreases, while D(0)p is rather constant. Gss and Gpp are increased by the disorder, being Gpp more affected than Gss.
arXiv comment2 pages, 3 figures, presented to the conference M2S-HTSC, 25-30 May 2003, Rio de Janeiro
References in corpus (7)
- Beyond Eliashberg superconductivity in MgB2: anharmonicity, two-phonon scattering, and multiple gaps
- Two-gap superconductivity in MgB: clean or dirty?
- Phenomenological two-gap model for the specific heat of MgB_2
- Electronic Structure, Electron-Phonon Coupling, and Multiband Effects in MgB2
- Effect of magnetic and non-magnetic impurities on highly anisotropic superconductivity
- The Tc amplification by quantum interference effects in diborides
- Thermal conductivity of MgB in the superconducting state