Curie-Weiss susceptibility in strongly correlated electron systems

0538983 - FZÚ 2021 RIV US eng J - Journal Article
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
R&D Projects: GA ČR GA19-13525S; GA MŠMT LTC19045
Institutional support: RVO:68378271
Keywords : parquet equations * mean-field approximation * Anderson impurity model * quantum and thermal fluctuations * magnetic susceptibility * Curie-Weiss law
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 4.036, year: 2020
Method of publishing: Limited access
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.
Permanent Link: http://hdl.handle.net/11104/0316714