Ground states of an extended Falicov-Kimball model |
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| Authors: | P MR Brydon M Gulácsi A Bussmann-Holder |
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| Institution: | 1. Max-Planck-Institut für Festk?rporforschung, Heisenbergstr. 1, 70569, Stuttgart, Germany
2. Department of Theoretical Physics, Institute of Advanced Studies, The Australian National University, Canberra, ACT, 0200, Australia
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| Abstract: | We present a non-perturbative study of an extended Falicov-Kimball model in
one
dimension. Working within the binary alloy interpretation, we include the
spin of the itinerant electrons and a Hubbard interaction to model the
inter-electron correlations. We derive an effective Ising model for the atomic
configuration in order to show how the Hubbard term affects the stability
of the phase separated states. Furthermore, we investigate the competition
between the Mott insulator state of the itinerant electrons and the
checkerboard phase of the spinless Falicov-Kimball model. |
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| Keywords: | 71 10 Fd Lattice fermion models (Hubbard model etc ) 71 30 +h Metal-insulator transitions and other electronic transitions |
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