Theory of strongly correlated f and d-electron systems. I. Exact Hamiltonian, Hubbard-Anderson models and perturbation theory near atomic limit within non-orthogonal basis set
| dc.creator | Sandalov, Igor | |
| dc.creator | Johansson, Borje | |
| dc.creator | Eriksson, Olle | |
| dc.date | 2000-11-15 | |
| dc.date.accessioned | 2026-07-25T14:13:13Z | |
| dc.description | The theory of correlated electron systems is formulated in a form which allows to use as a reference point an ab initio band structure theory (AIBST). The theory is constructed in two steps. As a first step the total Hamiltonian is transformed into a correlated form. In order to elucidate the microscopical origin of the parameters of the periodical Hubbard-Anderson model (PHAM) the terms of the full Hamiltonian which have the operator structure of PHAM are separated. It is found that the matrix element of mixing interaction includes ion-configuration and number-of-particles dependent contributions from the Coulomb interaction. In a second step the diagram technique (DT) is developed by means of generalization of the Baym-Kadanoff method for correlated systems. | |
| dc.description | 40 pages, 6 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0011259 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0011259 | |
| dc.identifier | Int. J Quantum Chem. 94 (3), 113 (2003) | |
| dc.identifier | doi:10.1002/qua.10599 | |
| dc.identifier.uri | https://dspace.dare.co.zw/handle/123456789/23994 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Theory of strongly correlated f and d-electron systems. I. Exact Hamiltonian, Hubbard-Anderson models and perturbation theory near atomic limit within non-orthogonal basis set | |
| dc.type | text |