Metal-insulator transition in a degenerate Hubbard model

Mahadevan, Priya and Sarma, DD (1999) Metal-insulator transition in a degenerate Hubbard model. In: Physical Review B: Condensed Matter, 59 (3). pp. 1739-1742.

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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 U-c, is found to depend strongly on the band filling, with U-c similar to root 3 W (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. [S0163-1829(99)11003-8].

Item Type:	Journal Article
Publication:	Physical Review B: Condensed Matter
Publisher:	The American Physical Society
Additional Information:	Copyright of this article belongs to The American Physical Society.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit Division of Physical & Mathematical Sciences > Physics
Date Deposited:	30 Jun 2011 11:39
Last Modified:	30 Jun 2011 11:39
URI:	http://eprints.iisc.ac.in/id/eprint/38655

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