Electron-hole liquid in the hexaborides
M. E. Zhitomirsky, T. M. Rice
TL;DR
This paper explores the stability and energetics of electron-hole liquids in divalent metal hexaborides, highlighting the importance of intervalley scattering in exciton stabilization and potential Bose gas formation.
Contribution
It provides a comparative analysis of electron-hole plasma energy calculations using RPA and Hubbard schemes, emphasizing the role of intervalley scattering.
Findings
Intervalley scattering enhances exciton binding energy.
Electron-hole plasma energetics are analyzed with RPA and Hubbard models.
Stability conditions for dilute exciton Bose gas are discussed.
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.
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