Mean-field approximation for thermodynamic and spectral functions of correlated electrons: strong coupling and arbitrary band filling

Kód výsledku v IS VaVaI

RIV/68378271:_____/17:00482157 - isvavai.cz

Výsledek na webu

http://dx.doi.org/10.1103/PhysRevB.95.165113

DOI - Digital Object Identifier

10.1103/PhysRevB.95.165113

Jazyk výsledku

angličtina

Název v původním jazyce

Mean-field approximation for thermodynamic and spectral functions of correlated electrons: strong coupling and arbitrary band filling

Popis výsledku v původním jazyce

We present a construction of a mean-field theory for thermodynamic and spectral properties of correlated electrons reliable in the strong-coupling limit. We introduce an effective interaction determined self-consistently from the reduced parquet equations. It is a static local approximation of the two-particle irreducible vertex, the kernel of a potentially singular Bethe-Salpeter equation. The effective interaction enters the Ward identity from which a thermodynamic self-energy, renormalizing the one-electron propagators, is determined. The dynamical Schwinger-Dyson equation with the thermodynamic propagators is then used to calculate the spectral properties. The thermodynamic and spectral properties of correlated electrons are in this way determined on the same footing and in a consistent manner. Such a mean-field approximation is analytically controllable and free of unphysical behavior and spurious phase transitions.n

Název v anglickém jazyce

Mean-field approximation for thermodynamic and spectral functions of correlated electrons: strong coupling and arbitrary band filling

Popis výsledku anglicky

We present a construction of a mean-field theory for thermodynamic and spectral properties of correlated electrons reliable in the strong-coupling limit. We introduce an effective interaction determined self-consistently from the reduced parquet equations. It is a static local approximation of the two-particle irreducible vertex, the kernel of a potentially singular Bethe-Salpeter equation. The effective interaction enters the Ward identity from which a thermodynamic self-energy, renormalizing the one-electron propagators, is determined. The dynamical Schwinger-Dyson equation with the thermodynamic propagators is then used to calculate the spectral properties. The thermodynamic and spectral properties of correlated electrons are in this way determined on the same footing and in a consistent manner. Such a mean-field approximation is analytically controllable and free of unphysical behavior and spurious phase transitions.n

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

GA15-14259S: Kvantové kritické jevy v silně korelovaných elektronových systémech: konsistentní popis spektrálních a termodynamických vlastností

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Physical Review B

ISSN

2469-9950

e-ISSN

—

Svazek periodika

95

Číslo periodika v rámci svazku

16

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

—

Kód UT WoS článku

000401765800005

EID výsledku v databázi Scopus

2-s2.0-85017228308