Curie-Weiss susceptibility in strongly correlated electron systems

0538983 - FZÚ 2021 RIV US eng J - Článek v odborném periodiku
Janiš, Václav - Klíč, Antonín - Yan, Jiawei - Pokorný, Vladislav
Curie-Weiss susceptibility in strongly correlated electron systems.
Physical Review B. Roč. 102, č. 20 (2020), s. 1-13, č. článku 205120. ISSN 2469-9950. E-ISSN 2469-9969
Grant CEP: GA ČR GA19-13525S; GA MŠMT LTC19045
Institucionální podpora: RVO:68378271
Klíčová slova: parquet equations * mean-field approximation * Anderson impurity model * quantum and thermal fluctuations * magnetic susceptibility * Curie-Weiss law
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 4.036, rok: 2020
Způsob publikování: Omezený přístup
https://doi.org/10.1103/PhysRevB.102.205120

The genesis of the Curie-Weiss magnetic response observed in most transition metals that are Fermi liquids at low temperatures has been an enigma for decades and has not yet been fully explained from microscopic principles. We show on the single-impurity Anderson model how the quantum dynamics of strong electron correlations leads to the Curie-Weiss magnetic susceptibility sufficiently above the Kondo temperature. Such behavior has not yet been demonstrated and can be observed only when the bare interaction is substantially screened (renormalized) and a balance between quantum and thermal fluctuations is kept. We set quantitative criteria for the existence of the Curie-Weiss law.
Trvalý link: http://hdl.handle.net/11104/0316714