Published June 2008 | Version v1
Journal article Metadata-only

Generalization of iterative perturbation theory and coherent potential approximation (ITP+CPA) to double exchange model with orbital degeneracy

Creators

  • 1. Department of Physics, Henan Normal University, Xinxiang 453007 (China)
  • 2. Department of Physics, Henan Institute of Education, Zhengzhou 450014 (China)
  • 3. Department of Physics, Nanjing University, Nanjing 210093 (China)

Description

A combination of the iterative perturbation theory (ITP) of the dynamical mean field theory (DMFT) and coherent-potential approximation (CPA) is generalized to the double exchange model with orbital degeneracy. The Hubbard interaction and the off-diagonal components for the hopping matrix tmnij(m ≠ n) are considered in our calculation of spectrum and optical conductivity. The numerical results show that the effects of the non-diagonal hopping matrix elements are important

Availability note (English)

Available from http://dx.doi.org/10.1088/1674-1056/17/6/057

Additional details

Identifiers

DOI
10.1088/1674-1056/17/6/057;

Publishing Information

Journal Title
Chinese Physics. B
Journal Volume
17
Journal Issue
6
Journal Page Range
p. 2277-2280
ISSN
1674-1056

INIS

Country of Publication
China
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
44125335
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
ABSORPTION SPECTRA; APPROXIMATIONS; HUBBARD MODEL; ITERATIVE METHODS; MATRICES; MEAN-FIELD THEORY; NUMERICAL SOLUTION; OPACITY; PERTURBATION THEORY; POTENTIALS
Descriptors DEC
CALCULATION METHODS; CRYSTAL MODELS; MATHEMATICAL MODELS; MATHEMATICAL SOLUTIONS; OPTICAL PROPERTIES; PHYSICAL PROPERTIES; SPECTRA