We have calculated the ground-state energy of an electron-hole liquid. The kinetic and exchange energies are included exactly, and the correlation energy is estimated using Hubbard's modification of the random-phase approximation. In an isotropic electron-hole liquid, the metallic state is not bound relative to free excitons. In Ge the anisotropic band structure leads to a substantial binding of the metallic state. Application of a large 111 strain to Ge reduces the situation to one resembling the isotropic case.
|Original language||American English|
|Number of pages||4|
|Journal||Physical review letters|
|State||Published - Jan 1 1972|
ASJC Scopus subject areas
- Physics and Astronomy(all)