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The Green function variational approximation : significance of physical constraints

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The Green function variational approximation : significance of physical constraints

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dc.contributor.author Bieniasz, Krzysztof [USOS61684] pl
dc.contributor.author Berciu, M. pl
dc.contributor.author Oleś, Andrzej [SAP11009398] pl
dc.date.accessioned 2016-12-21T12:58:33Z
dc.date.available 2016-12-21T12:58:33Z
dc.date.issued 2016 pl
dc.identifier.issn 0587-4246 pl
dc.identifier.uri http://ruj.uj.edu.pl/xmlui/handle/item/34418
dc.language eng pl
dc.rights Udzielam licencji. Uznanie autorstwa - Użycie niekomercyjne - Bez utworów zależnych 4.0 Międzynarodowa *
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/4.0/pl/legalcode *
dc.title The Green function variational approximation : significance of physical constraints pl
dc.type JournalArticle pl
dc.description.physical 659-662 pl
dc.abstract.en We present a calculation of the spectral properties of a single charge doped at a Cu(3d) site of the Cu-F plane in KCuF_{3}. The problem is treated by generating the equations of motion for the Green function by means of subsequent Dyson expansions and solving the resulting set of equations. This method, dubbed the variational approximation, is both very dependable and flexible, since it is a systematic expansion with precise control over elementary physical processes. It allows for deep insight into the underlying physics of polaron formation as well as for inclusion of many physical constraints, such as excluding crossing diagrams and double occupation constraint, which are not included in the self-consistent Born approximation. Here we examine the role and importance of such constraints by analyzing various spectral functions obtained in second order variational approximation. pl
dc.description.volume 130 pl
dc.description.number 2 pl
dc.identifier.doi 10.12693/APhysPolA.130.659 pl
dc.identifier.eissn 1898-794X pl
dc.title.journal Acta Physica Polonica. A pl
dc.title.volume Proceedings of the XVII National Conference on Superconductivity Karpacz, Poland, October 25-30, 2015, "Superconductivity and other emergent states in systems with strongly correlated electrons" pl
dc.language.container eng pl
dc.affiliation Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego pl
dc.subtype Article pl
dc.rights.original OTHER; otwarte czasopismo; ostateczna wersja wydawcy; w momencie opublikowania; 0 pl
dc.identifier.project ROD UJ / P pl
.pointsMNiSW [2016 A]: 15


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Udzielam licencji. Uznanie autorstwa - Użycie niekomercyjne - Bez utworów zależnych 4.0 Międzynarodowa Except where otherwise noted, this item's license is described as Udzielam licencji. Uznanie autorstwa - Użycie niekomercyjne - Bez utworów zależnych 4.0 Międzynarodowa