Electron-hole liquid in the hexaborides

Details Electron-hole liquid in the hexaborides Electron-hole liquid in the hexaborides

1999-10-18

arxiv.org/abs/cond-mat/9910272v2

Phys. Rev. B 62, 1492 (2000)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

10.1103/PhysRevB.62.1492

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 RPA 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.

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