Properties of the electron-hole liquid beyond the local density approximation
- 15 January 1977
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 15 (2) , 979-988
- https://doi.org/10.1103/physrevb.15.979
Abstract
An exact evaluation is given in the high-density limit of the first gradient coefficient which enters the exchange plus correlation energy in the Hohenberg-Kohn-Sham formalism for an inhomogeneous two-component (electron-hole) system. Numerical results are given for isotropic electron and hole bands for a range of values of the electron-hole mass and density ratios. An application is made to Ge under [111] strain and the surface energy is calculated in a simple model.Keywords
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