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Title: Filling dependence of the Mott transition in the degenerate Hubbard model

Abstract

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.

Authors:
 [1];  [2];  [3]
  1. Max-Planck-Institut fuer Festkoerperforschung, D-70506 Stuttgart, (Germany)
  2. Max-Planck-Institut fuer Festkoeperforschung, D-70506 Stuttgart, (Germany)
  3. Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)
Publication Date:
OSTI Identifier:
20217817
Resource Type:
Journal Article
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 60; Journal Issue: 23; Other Information: PBD: 15 Dec 1999; Journal ID: ISSN 1098-0121
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; HUBBARD MODEL; FULLERENES; DOPED MATERIALS; ENERGY GAP; ELECTRON-ELECTRON INTERACTIONS; MONTE CARLO METHOD; PHASE TRANSFORMATIONS; THEORETICAL DATA

Citation Formats

Koch, Erik, Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, Gunnarsson, Olle, and Martin, Richard M. Filling dependence of the Mott transition in the degenerate Hubbard model. United States: N. p., 1999. Web. doi:10.1103/PhysRevB.60.15714.
Koch, Erik, Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, Gunnarsson, Olle, & Martin, Richard M. Filling dependence of the Mott transition in the degenerate Hubbard model. United States. doi:10.1103/PhysRevB.60.15714.
Koch, Erik, Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, Gunnarsson, Olle, and Martin, Richard M. Wed . "Filling dependence of the Mott transition in the degenerate Hubbard model". United States. doi:10.1103/PhysRevB.60.15714.
@article{osti_20217817,
title = {Filling dependence of the Mott transition in the degenerate Hubbard model},
author = {Koch, Erik and Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 and Gunnarsson, Olle and Martin, Richard M},
abstractNote = {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.},
doi = {10.1103/PhysRevB.60.15714},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 23,
volume = 60,
place = {United States},
year = {1999},
month = {12}
}