Electronic structure of α-Sn and its dependence on hydrostatic strain

Abstract

The electronic structure of \ensuremath{\alpha}-Sn is calculated within the local-density approximation. As a result of the inadequacies of this approximation for the description of excitation energies, the band structure is corrected to agree with energy differences at points of high symmetry by introducing additional external potentials on the atomic sites as well as on the interstitial positions of the diamond lattice. The resulting band structures are used to obtain effective masses as well as hydrostatic deformation potentials.