Electron-hole liquid in the hexaborides

Abstract

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.

4 pages, 3 figures

References in corpus (2)

• Excitonic ferromagnetism in the hexaborides
• Ferromagnetism and superstructure in Ca_{1-x}La_xB_6

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• Theory of Ferromagnetism in Doped Excitonic Condensates
• Whither Correlated Electron Theory?
• Field-Tuning of the electron and hole populations in the ruthenate Bi_3Ru_3O_11
• Theory of High \tc Ferromagnetism in $Sr{B}_6$ family: A case of Doped Spin-1 Mott insulator in a Valence Bond Solid Phase