| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9586219 | Journal of Luminescence | 2005 | 5 Pages |
Abstract
To understand the essence of the exciton Mott transition in three-dimensional electron-hole systems, the metal-insulator transition is studied for a two-band Hubbard model in infinite dimensions with interactions of electron-electron (hole-hole) repulsion U and electron-hole attraction -Uâ². By using the dynamical mean-field theory, the phase diagram in the U-Uâ² plane is obtained (which is exact in infinite dimensions) assuming that electron-hole pairs do not condense. When both electron and hole bands are half-filled, two types of insulating states appear: the Mott-Hubbard insulator for U>Uâ² and the biexciton-like insulator for U
Keywords
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Yuh Tomio, Tetsuo Ogawa,