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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2007, Volume 86, Issue 10, Pages 769–774
(Mi jetpl923)
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This article is cited in 36 scientific papers (total in 36 papers)
CONDENSED MATTER
Cluster Dual Fermion Approach to Nonlocal Correlations
H. Hafermanna, S. Brenera, A. N. Rubtsovb, M. I. Katsnel'sonc, A. I. Lichtensteina a Institute of Theoretical Physics, University of Hamburg, 20355 Hamburg, Germany
b Department of Physics, Moscow State University
c Institute for Molecules and Materials, Radboud University, 6525 ED Nijmegen, The Netherlands
Abstract:
We formulate a general cluster Dual Fermion Approach to nonlocal correlations in crystals. The scheme
allows the treatment of long-range correlations beyond the cluster DMFT and nonlocal effects in realistic
calculations of multiorbital systems. We show that the simplest approximation exactly corresponds to the freecluster DMFT. We apply this approach to the one-dimensional Hubbard model. Already the first dual-fermion
correction to the free cluster leads to a drastic improvement of the calculated Green function.
Received: 13.09.2007 Revised: 18.10.2007
Citation:
H. Hafermann, S. Brener, A. N. Rubtsov, M. I. Katsnel'son, A. I. Lichtenstein, “Cluster Dual Fermion Approach to Nonlocal Correlations”, Pis'ma v Zh. Èksper. Teoret. Fiz., 86:10 (2007), 769–774; JETP Letters, 86:10 (2007), 677–682
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https://www.mathnet.ru/eng/jetpl923 https://www.mathnet.ru/eng/jetpl/v86/i10/p769
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Abstract page: | 1241 | Full-text PDF : | 69 | References: | 33 |
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