Kondo temperature and high to low temperature crossover in impurity models of correlated electrons

0533301 - FZÚ 2021 RIV JP eng C - Konferenční příspěvek (zahraniční konf.)
Janiš, Václav - Klíč, Antonín
Kondo temperature and high to low temperature crossover in impurity models of correlated electrons.
JPS Conference Proceedings. Vol. 30. Tokyo: Physical Society of Japan, 2020 - (Hotta, T.; Katsufuji, T.), s. 1-7, č. článku 011124. ISBN 978-4-89027-142-9. ISSN 2435-3892.
[International Conference on Strongly Correlated Electron Systems (SCES2019). Okayama (JP), 23.09.2020-28.09.2020]
Grant CEP: GA ČR GA19-13525S
Institucionální podpora: RVO:68378271
Klíčová slova: Kondo temperature * quantum fluctuations * thermal fluctuations * Curie-Weiss law
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)

Kondo temperature is standardly defined from the local zero-temperature susceptibility in the regime of strong electron correlations as a new scale controlling the low-temperature asymptotics of thermodynamic quantities of diluted impurities. We show by using a two-particle self-consistent theory that the Kondo temperature can be identified as a crossover temperature at which the zero-temperature quantum fluctuations equal the thermal ones in the electron–hole correlation function. The high-temperature Curie–Weiss susceptibility is shown to go over to the Pauli one below the Kondo temperature.
Trvalý link: http://hdl.handle.net/11104/0311719