Filling dependence of the Mott transition in the degenerate Hubbard model
Journal Article
·
· Physical Review. B, Condensed Matter and Materials Physics
- Max-Planck-Institut fuer Festkoerperforschung, D-70506 Stuttgart, (Germany)
- Max-Planck-Institut fuer Festkoeperforschung, D-70506 Stuttgart, (Germany)
- Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)
Describing the doped Fullerenes using a generalized Hubbard model, we study the Mott transition for different integer fillings of the t{sub 1u} band. We use the opening of the energy-gap E{sub g} as a criterion for the transition. E{sub g} is calculated as a function of the on-site Coulomb interaction U using fixed-node diffusion Monte Carlo. We find that for systems with doping away from half filling the Mott transitions occurs at smaller U than for the half-filled system. We give a simple model for the doping dependence of the Mott transition. (c) 1999 The American Physical Society.
- OSTI ID:
- 20217817
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 60, Issue 23; Other Information: PBD: 15 Dec 1999; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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