2025-02-23T10:42:23-05:00 DEBUG: VuFindSearch\Backend\Solr\Connector: Query fl=%2A&wt=json&json.nl=arrarr&q=id%3A%22irk-123456789-121358%22&qt=morelikethis&rows=5
2025-02-23T10:42:23-05:00 DEBUG: VuFindSearch\Backend\Solr\Connector: => GET http://localhost:8983/solr/biblio/select?fl=%2A&wt=json&json.nl=arrarr&q=id%3A%22irk-123456789-121358%22&qt=morelikethis&rows=5
2025-02-23T10:42:23-05:00 DEBUG: VuFindSearch\Backend\Solr\Connector: <= 200 OK
2025-02-23T10:42:23-05:00 DEBUG: Deserialized SOLR response
Sd-model with strong exchange coupling and a metal-insulator phase transition

Sd-model with strong exchange coupling and a metal-insulator phase transition

Sd-exchange model (Kondo lattice model) is formulated for strong sd-coupling within the framework of the Xoperators technique and the generating functional approach. The X-operators are constructed based on the exact eigen functions of a single-site sd-exchange Hamiltonian. Such representation ena...

Full description

Saved in:
Bibliographic Details
Main Authors: Izyumov, Yu.A., Chaschin, N.I., Alexeev, D.S.
Format: Article
Language:English
Published: Інститут фізики конденсованих систем НАН України 2006
Series:Condensed Matter Physics
Online Access:http://dspace.nbuv.gov.ua/handle/123456789/121358
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Sd-exchange model (Kondo lattice model) is formulated for strong sd-coupling within the framework of the Xoperators technique and the generating functional approach. The X-operators are constructed based on the exact eigen functions of a single-site sd-exchange Hamiltonian. Such representation enables us to develop a perturbation theory near the atomic level. A locator-type representation was derived for the electron Green’s function. The electron self-energy includes interaction of electrons and spin fluctuations. An integral equation for the self-energy was obtained in the limit of infinite localized spins. A solution of this equation in the static approximation for spin fluctuations leads to a structure of electron Green’s function showing a metal-insulator phase transition. This transition is similar to that in the Hubbard model at half filling.

Similar Items