Spectral Properties and Bandstructure of Correlated Electron Systems

Details Spectral Properties and Bandstructure of Correlated Electron Systems Spectral Properties and Bandstructure of Correlated Electron Systems

1995-10-04

arxiv.org/abs/cond-mat/9510022v1

Physics

Condensed Matter

Paper presented at SCES '95, Sept. 27 - 30 1995, Goa. To be published in Physica B. 10 pages, figures included

Scientific paper

10.1016/0921-4526(96)00188-3

We present $\vec{k}$-dependent one-particle spectra and corresponding effective bandstructures for the $2d$ Hubbard model calculated within the dynamical molecular field theory (DMFT). This method has proven to yield highly nontrivial results for a variety of quantities but the question remains open to what extent it is applicable to relevant physical situations. To address this problem we compare our results for spectral functions to those obtained by QMC simulations. The good agreement supports our notion that the DMFT is indeed a sensible ansatz for correlated models even in to $d=2$.

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