Off-site interaction effect in the Extended Hubbard Model with the SCRPA method
Creators
- 1. Laboratoire de Physique de la Matiere Condensee, Faculte des Sciences Ben M'Sik, Universite Hassan II-Mohammedia Casablanca (Morocco)
Description
The self consistent random phase approximation (SCRPA) and a direct analytical (DA) method are proposed to solve the Extended Hubbard Model (EHM) in one dimension (1D). We have considered an EHM including on-site and off-site interactions for closed chains in 1D with periodic boundary conditions. The comparison of the SCRPA results with the ones obtained by a DA approach shows that the SCRPA treats the problem of these closed chains in a rigorous manner. The analysis of the nearest-neighbour repulsion effect on the dynamics of our closed chains shows that this repulsive interaction between the electrons of the neighbouring atoms induces supplementary conductivity, since, the SCRPA energygap vanishes when these closed chains are governed by a strong repulsive on-site interaction and intermediate nearest-neighbour repulsion
Additional details
Identifiers
- DOI
- 10.1088/0031-8949/76/4/015;
- PII
- S0031-8949(07)48062-15;
Publishing Information
- Journal Title
- Physica Scripta (Online)
- Journal Volume
- 76
- Journal Issue
- 4
- Journal Page Range
- p. 370-374
- ISSN
- 1402-4896
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 39032109
- Subject category
- S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
- Descriptors DEI
- BOUNDARY CONDITIONS; COMPARATIVE EVALUATIONS; ELECTRONS; HUBBARD MODEL; INTERACTIONS; PERIODICITY; RANDOM PHASE APPROXIMATION
- Descriptors DEC
- APPROXIMATIONS; CALCULATION METHODS; CRYSTAL MODELS; ELEMENTARY PARTICLES; EVALUATION; FERMIONS; LEPTONS; MATHEMATICAL MODELS; VARIATIONS