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VOLUME 53 (1991) | ISSUE 9 | PAGE 444
Excitonic insulator in a magnetized quasi-2D plasma
In a neutral low-temperature magnetoplasma, electrons and holes from upper occupied Landau levels in the conduction band and in the valence band bind to form magnetoexcitons. In other words, a state of an excitonic insulator is realized. The magnetoexcitons in a common Landau level (yf — j%) may be thought of as noninteracting. The interaction between magnetoexcitons of different levels leads to a lowering of the energy.