Dual fermion approach to nonlocal correlations in the Hubbard model

A. N. Rubtsov, M. I. Katsnelson, and A. I. Lichtenstein
Phys. Rev. B 77, 033101 – Published 11 January 2008

Abstract

A diagrammatic technique is developed to describe nonlocal effects (e.g., pseudogap formation) in the Hubbard-like models. In contrast to cluster approaches, this method utilizes an exact transition to the dual set of variables, and it therefore becomes possible to treat the irreducible vertices of an effective single-impurity problem as small parameters. This provides a very efficient interpolation between weak coupling (band) and atomic limits. The antiferromagnetic pseudogap formation in the Hubbard model is correctly reproduced by just the lowest-order diagrams.

  • Figure
  • Figure
  • Received 26 October 2007

DOI:https://doi.org/10.1103/PhysRevB.77.033101

©2008 American Physical Society

Authors & Affiliations

A. N. Rubtsov1, M. I. Katsnelson2, and A. I. Lichtenstein3

  • 1Department of Physics, Moscow State University, 119992 Moscow, Russia
  • 2Institute for Molecules and Materials, Radboud University, 6525 ED Nijmegen, The Netherlands
  • 3Institute of Theoretical Physics, University of Hamburg, 20355 Hamburg, Germany

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 77, Iss. 3 — 15 January 2008

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×