We investigate the energetics of the electron-hole liquid in stoichiometric divalent-metal hexaborides. The ground-state energy of an electron-hole plasma is calculated using the random-phase approximation and Hubbard schemes and compared to the binding energy of a single exciton. Intervalley scattering processes play an important role in increasing this binding energy and stabilizing a dilute Bose gas of excitons.
Physical Review B
- Pub Date:
- July 2000
- Electron-hole drops and electron-hole plasma;
- Elements oxides nitrides borides carbides chalcogenides etc.;
- Condensed Matter - Strongly Correlated Electrons
- 4 pages, 3 figures