Spectral Properties and Bandstructure of Correlated Electron Systems

Th. Pruschke; Th. Obermeier; J. Keller; M. Jarrell

doi:10.1016/0921-4526(96)00188-3

Spectral Properties and Bandstructure of Correlated Electron Systems

Condensed Matter 2016-08-31 v1

Authors: Th. Pruschke , Th. Obermeier , J. Keller , M. Jarrell

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Abstract

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 $d=2$ .

Keywords

Hubbard model dynamical molecular field theory spectral function bandstructure quantum Monte Carlo

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@article{arxiv.cond-mat/9510022,
  title  = {Spectral Properties and Bandstructure of Correlated Electron Systems},
  author = {Th. Pruschke and Th. Obermeier and J. Keller and M. Jarrell},
  journal= {arXiv preprint arXiv:cond-mat/9510022},
  year   = {2016}
}

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

Spectral Properties and Bandstructure of Correlated Electron Systems

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