Electronic structure and magnetism in UGa2: DFT+DMFT approach

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00547732" target="_blank" >RIV/68378271:_____/21:00547732 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevB.103.205146" target="_blank" >https://doi.org/10.1103/PhysRevB.103.205146</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.103.205146" target="_blank" >10.1103/PhysRevB.103.205146</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Electronic structure and magnetism in UGa2: DFT+DMFT approach

Popis výsledku v původním jazyce

The debate whether uranium 5f electrons are closer to being localized or itinerant in the ferromagnetic compound UGa2 is not yet fully settled. The band theory, employing local exchange-correlation functionals, is biased toward itinerant 5f states and severely underestimates the magnetic moments. Using material-specific dynamical mean-field theory (LDA+DMFT), we probe how a less approximate description of electron-electron correlations improves the picture. We show that the LDA+DMFT method can accurately describe the magnetic moments in UGa2 as long as the exchange interaction between the uranium 6d and 5f electrons is preserved by a judicious choice of the spin-polarized double-counting correction. We discuss the computed electronic structure in relation to photoemission experiments and show how the correlations reduce the Sommerfeld coefficient of the electronic specific heat by shifting the 5f states slightly away from the Fermi level.

Název v anglickém jazyce

Electronic structure and magnetism in UGa2: DFT+DMFT approach

Popis výsledku anglicky

The debate whether uranium 5f electrons are closer to being localized or itinerant in the ferromagnetic compound UGa2 is not yet fully settled. The band theory, employing local exchange-correlation functionals, is biased toward itinerant 5f states and severely underestimates the magnetic moments. Using material-specific dynamical mean-field theory (LDA+DMFT), we probe how a less approximate description of electron-electron correlations improves the picture. We show that the LDA+DMFT method can accurately describe the magnetic moments in UGa2 as long as the exchange interaction between the uranium 6d and 5f electrons is preserved by a judicious choice of the spin-polarized double-counting correction. We discuss the computed electronic structure in relation to photoemission experiments and show how the correlations reduce the Sommerfeld coefficient of the electronic specific heat by shifting the 5f states slightly away from the Fermi level.

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

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

2469-9969

Svazek periodika

103

Číslo periodika v rámci svazku

20

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

14

Strana od-do

205146

Kód UT WoS článku

000655904700002

EID výsledku v databázi Scopus

2-s2.0-85107068726