Variational local moment approach: from Kondo effect to Mott transition in correlated electron systems

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F12%3A00386456" target="_blank" >RIV/68378271:_____/12:00386456 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.physb.2011.10.030" target="_blank" >http://dx.doi.org/10.1016/j.physb.2011.10.030</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physb.2011.10.030" target="_blank" >10.1016/j.physb.2011.10.030</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Variational local moment approach: from Kondo effect to Mott transition in correlated electron systems

Popis výsledku v původním jazyce

The variational local moment approach (VLMA) solution of the single impurity Anderson model is presented. It generalizes the local moment approach of Logan et al. by invoking the variational principle to determine the lengths of local moments and orbitaloccupancies. We show that VLMA is a comprehensive, conserving and thermodynamically consistent approximation and treats both Fermi and non-Fermi liquid regimes as well as local moment phases on equal footing. We tested VLMA on selected problems. We solved the single- and multi-orbital impurity Anderson model in various regions of parameters, where different types of Kondo effects occur. The application of VLMA as an impurity solver of the dynamical mean-field theory, used to solve the multi-orbital Hubbard model, is also addressed.

Název v anglickém jazyce

Variational local moment approach: from Kondo effect to Mott transition in correlated electron systems

Popis výsledku anglicky

The variational local moment approach (VLMA) solution of the single impurity Anderson model is presented. It generalizes the local moment approach of Logan et al. by invoking the variational principle to determine the lengths of local moments and orbitaloccupancies. We show that VLMA is a comprehensive, conserving and thermodynamically consistent approximation and treats both Fermi and non-Fermi liquid regimes as well as local moment phases on equal footing. We tested VLMA on selected problems. We solved the single- and multi-orbital impurity Anderson model in various regions of parameters, where different types of Kondo effects occur. The application of VLMA as an impurity solver of the dynamical mean-field theory, used to solve the multi-orbital Hubbard model, is also addressed.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

—

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physica. B

ISSN

0921-4526

e-ISSN

—

Svazek periodika

407

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

209-217

Kód UT WoS článku

000298544800004

EID výsledku v databázi Scopus

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