Structure of the normal state and origin of the Schottky anomaly in the correlated heavy-fermion superconductor UTe2

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F23%3A00580276" target="_blank" >RIV/68378271:_____/23:00580276 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevB.107.214501" target="_blank" >https://doi.org/10.1103/PhysRevB.107.214501</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.107.214501" target="_blank" >10.1103/PhysRevB.107.214501</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Structure of the normal state and origin of the Schottky anomaly in the correlated heavy-fermion superconductor UTe2

Popis výsledku v původním jazyce

The recently discovered UTe2 superconductor is regarded as a heavy-fermion mixed-valence system with very peculiar properties within the normal and superconducting (SC) states. It does not order magnetically, but has a strong anisotropy of magnetic susceptibility and SC critical field. In addition to a heavy-fermion-like behavior in the normal state, it exhibits a distinctive Schottky-type anomaly at ∼12 K and a characteristic excitations gap ∼35−40 K. Here, we show, by virtue of dynamical mean-field theory calculations with a quasiatomic treatment of electron correlations, that ab initio-derived crystal-field splitting of the 5f2 ionic configuration yields agreement with these experimental observations. A close analogy of the normal paramagnetic state of UTe2 to that of URu2Si2 in the Kondo arrest scenario is revealed.n

Název v anglickém jazyce

Structure of the normal state and origin of the Schottky anomaly in the correlated heavy-fermion superconductor UTe2

Popis výsledku anglicky

The recently discovered UTe2 superconductor is regarded as a heavy-fermion mixed-valence system with very peculiar properties within the normal and superconducting (SC) states. It does not order magnetically, but has a strong anisotropy of magnetic susceptibility and SC critical field. In addition to a heavy-fermion-like behavior in the normal state, it exhibits a distinctive Schottky-type anomaly at ∼12 K and a characteristic excitations gap ∼35−40 K. Here, we show, by virtue of dynamical mean-field theory calculations with a quasiatomic treatment of electron correlations, that ab initio-derived crystal-field splitting of the 5f2 ionic configuration yields agreement with these experimental observations. A close analogy of the normal paramagnetic state of UTe2 to that of URu2Si2 in the Kondo arrest scenario is revealed.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

<a href="/cs/project/GA22-19416S" target="_blank" >GA22-19416S: Napětím laděné magnetické a transportní vlastnosti tenkých vrstev na bázi uranu</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

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

107

Číslo periodika v rámci svazku

21

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

214501

Kód UT WoS článku

001009498800002

EID výsledku v databázi Scopus

2-s2.0-85163296158