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Title: Exact diagonalization solver for extended dynamical mean-field theory

Journal Article · · Physical Review B
 [1];  [2];  [3];  [1];  [4]
  1. Ural Federal Univ., Ekaterinburg (Russia). Theoretical Physics and Applied Mathematics Dept.
  2. Ural Federal Univ., Ekaterinburg (Russia). Theoretical Physics and Applied Mathematics Dept.; Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Physics
  3. Univ. of Hamburg (Germany). Inst. for Theoretical Physics
  4. Ural Federal Univ., Ekaterinburg (Russia). Theoretical Physics and Applied Mathematics Dept.; Univ. of Hamburg (Germany). Inst. for Theoretical Physics

This paper presents an efficient exact diagonalization scheme for the extended dynamical mean-field theory and apply it to the extended Hubbard model on the square lattice with nonlocal charge-charge interactions. Our solver reproduces the phase diagram of this approximation with good accuracy. Details on the numerical treatment of the large Hilbert space of the auxiliary Holstein-Anderson impurity problem are provided. Benchmarks with a numerically exact strong-coupling continuous-time quantum Monte Carlo solver show better convergence behavior of the exact diagonalization in the deep insulator. Special attention is given to possible effects due to the discretization of the bosonic bath. We discuss the quality of real axis spectra and address the question of screening in the Mott insulator within extended dynamical mean-field theory.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1544341
Alternate ID(s):
OSTI ID: 1416444
Journal Information:
Physical Review B, Vol. 96, Issue 23; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 13 works
Citation information provided by
Web of Science

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Cited By (3)

Charge ordering and nonlocal correlations in the doped extended Hubbard model journal March 2018
Charge ordering and non-local correlations in the doped extended Hubbard model text January 2018
Charge order and antiferromagnetism in the extended Hubbard model text January 2019

Figures / Tables (10)


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