Mahadevan, Priya ; Sarma, D. D. (1999) Metal-insulator transition in a degenerate Hubbard model Physical Review B: Condensed Matter and Materials Physics, 59 (3). pp. 1739-1742. ISSN 1098-0121
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Official URL: http://prb.aps.org/abstract/PRB/v59/i3/p1739_1
Related URL: http://dx.doi.org/10.1103/PhysRevB.59.1739
Abstract
We have studied the metal-insulator transition at integer fillings in a triply degenerate Hubbard model using the Lanczos method. The critical Coulomb interaction strength Uc is found to depend strongly on the band filling, with Uc~√3W(W is the bandwidth) at half filling for this case with threefold degeneracy. We discuss the implications of our results on metal-insulator transitions in strongly correlated systems in general, and on the unusual electronic ground state of the alkali-metal-doped fullerenes, in particular.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 46433 |
| Deposited On: | 04 Jul 2011 11:53 |
| Last Modified: | 04 Jul 2011 11:53 |
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