paper

Specific heat of MgB $_{2}$ in a one- and a two-band model from first-principles calculations

arXiv:cond-mat/0111262 · doi:10.1088/0953-8984/14/6/320

Abstract

The heat capacity anomaly at the transition to superconductivity of the layered superconductor MgB $_{2}$ is compared to first-principles calculations with the Coulomb repulsion, $I^¼^{*}$ , as the only parameter which is fixed to give the measured $T_{c}$ . We solve the Eliashberg equations for both an isotropic one-band and a two-band model with different superconducting gaps on the $I ¨ $ and $I ¨ $ Fermi surfaces. The agreement with experiments is considerably better for the two-band model than for the one-band model.

final published version

Specific heat of MgB2​ in a one- and a two-band model from first-principles calculations

Abstract

Specific heat of MgB $_{2}$ in a one- and a two-band model from first-principles calculations