Diagrammatic approach for the twofold degenerate Anderson impurity model

The twofold degenerate Anderson impurity model [1-4] is investigated in normal and superconducting states, and the strong electronic correlations of d-electrons of impurity ion are taken into account by elaborating a suitable diagram technique. We discuss the properties of the Slater-Kanamori model...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Moscalenco, Vsevolod, Dohotaru, Leonid, Digor, Dumitru, Cebotari, Irina
Formato:	article
Lenguaje:	EN
Publicado:	D.Ghitu Institute of Electronic Engineering and Nanotechnologies 2013
Materias:	Physics QC1-999 Electronics TK7800-8360
Acceso en línea:	https://doaj.org/article/3ebdfc75cf4d4878b261034164e09899
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:3ebdfc75cf4d4878b261034164e09899
record_format	dspace
spelling	oai:doaj.org-article:3ebdfc75cf4d4878b261034164e098992021-11-21T11:59:48ZDiagrammatic approach for the twofold degenerate Anderson impurity model2537-63651810-648Xhttps://doaj.org/article/3ebdfc75cf4d4878b261034164e098992013-06-01T00:00:00Zhttps://mjps.nanotech.md/archive/2013/article/29768https://doaj.org/toc/1810-648Xhttps://doaj.org/toc/2537-6365The twofold degenerate Anderson impurity model [1-4] is investigated in normal and superconducting states, and the strong electronic correlations of d-electrons of impurity ion are taken into account by elaborating a suitable diagram technique. We discuss the properties of the Slater-Kanamori model [2-4] of d-impurity electrons. After finding the eigenfunctions and eigenvalues of all 16 local states, we determine the local one-particle propagator. Then we construct the perturbation theory around the atomic limit of the impurity ion and obtain the Dyson type equations between impurity electron propagators and normal and anomalous correlation functions. By summing infinite series of ladder diagrams, the approximation for correlation functions is established. The criterion for appearance of a superconducting state of the model is discussed.Moscalenco, VsevolodDohotaru, LeonidDigor, DumitruCebotari, IrinaD.Ghitu Institute of Electronic Engineering and NanotechnologiesarticlePhysicsQC1-999ElectronicsTK7800-8360ENMoldavian Journal of the Physical Sciences, Vol 12, Iss 3-4, Pp 199-220 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999 Electronics TK7800-8360
spellingShingle	Physics QC1-999 Electronics TK7800-8360 Moscalenco, Vsevolod Dohotaru, Leonid Digor, Dumitru Cebotari, Irina Diagrammatic approach for the twofold degenerate Anderson impurity model
description	The twofold degenerate Anderson impurity model [1-4] is investigated in normal and superconducting states, and the strong electronic correlations of d-electrons of impurity ion are taken into account by elaborating a suitable diagram technique. We discuss the properties of the Slater-Kanamori model [2-4] of d-impurity electrons. After finding the eigenfunctions and eigenvalues of all 16 local states, we determine the local one-particle propagator. Then we construct the perturbation theory around the atomic limit of the impurity ion and obtain the Dyson type equations between impurity electron propagators and normal and anomalous correlation functions. By summing infinite series of ladder diagrams, the approximation for correlation functions is established. The criterion for appearance of a superconducting state of the model is discussed.
format	article
author	Moscalenco, Vsevolod Dohotaru, Leonid Digor, Dumitru Cebotari, Irina
author_facet	Moscalenco, Vsevolod Dohotaru, Leonid Digor, Dumitru Cebotari, Irina
author_sort	Moscalenco, Vsevolod
title	Diagrammatic approach for the twofold degenerate Anderson impurity model
title_short	Diagrammatic approach for the twofold degenerate Anderson impurity model
title_full	Diagrammatic approach for the twofold degenerate Anderson impurity model
title_fullStr	Diagrammatic approach for the twofold degenerate Anderson impurity model
title_full_unstemmed	Diagrammatic approach for the twofold degenerate Anderson impurity model
title_sort	diagrammatic approach for the twofold degenerate anderson impurity model
publisher	D.Ghitu Institute of Electronic Engineering and Nanotechnologies
publishDate	2013
url	https://doaj.org/article/3ebdfc75cf4d4878b261034164e09899
work_keys_str_mv	AT moscalencovsevolod diagrammaticapproachforthetwofolddegenerateandersonimpuritymodel AT dohotaruleonid diagrammaticapproachforthetwofolddegenerateandersonimpuritymodel AT digordumitru diagrammaticapproachforthetwofolddegenerateandersonimpuritymodel AT cebotariirina diagrammaticapproachforthetwofolddegenerateandersonimpuritymodel
_version_	1718419298073968640

Diagrammatic approach for the twofold degenerate Anderson impurity model

Ejemplares similares