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Dual-fermion approach to the Anderson-Hubbard model

Journal Article · · Physical Review. B
 [1];  [2];  [3];  [2];  [2]
  1. Univ. of Gottingen (Germany); DOE/OSTI
  2. Louisiana State Univ., Baton Rouge, LA (United States); Louisiana State Univ., Baton Rouge, LA (United States). Center for Computation and Technology
  3. Univ. of Gottingen (Germany)
In this work, we apply the recently developed dual-fermion algorithm for disordered interacting systems to the Anderson-Hubbard model. This algorithm is compared with dynamical cluster approximation calculations for a one-dimensional system to establish the quality of the approximation in comparison with an established cluster method. We continue with a three-dimensional (3D) system and look at the antiferromagnetic, Mott, and Anderson localization transitions. The dual-fermion approach leads to quantitative as well as qualitative improvement of the dynamical mean-field results, and it allows one to calculate the hysteresis in the double occupancy in 3D, taking into account nonlocal correlations.
Research Organization:
Louisiana State Univ., Baton Rouge, LA (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE; USDOE Office of Science (SC)
Grant/Contract Number:
SC0005274
OSTI ID:
1535839
Alternate ID(s):
OSTI ID: 1339771
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 4 Vol. 95; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (2)

Diagrammatic routes to nonlocal correlations beyond dynamical mean field theory journal May 2018
Diagrammatic routes to nonlocal correlations beyond dynamical mean field theory text January 2017

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