Abstract
The surface energy of the electron-hole liquid in Ge is calculated using the density-functional formalism. The kinetic energy is included exactly within an uncoupled spherical band model. Corrections to order are included in the evaluation of the exchange and correlation energy and also in the evaluation of the effects of band coupling and anisotropy on the kinetic energy. We obtain a surface energy of 2.5 × erg/ and an electrostatic dipole barrier of 0.16 meV. The small value of leads to the conclusion that the charge on the droplet is negative.
- Received 9 August 1976
DOI:https://doi.org/10.1103/PhysRevB.17.1884
©1978 American Physical Society