Antiferromagnetic fluctuations in the one-dimensional Hubbard model

0537587 - FZÚ 2021 RIV US eng J - Článek v odborném periodiku
Janiš, Václav - Klíč, Antonín - Yan, Jiawei
Antiferromagnetic fluctuations in the one-dimensional Hubbard model.
AIP Advances. Roč. 10, Dec (2020), s. 1-6, č. článku 125127. E-ISSN 2158-3226
Grant CEP: GA MŠMT LTC19045; GA ČR GA19-13525S
Institucionální podpora: RVO:68378271
Klíčová slova: Hubbard model * linear chain * antiferromagnetic fluctuations * effective interaction * quantum critical point
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 1.548, rok: 2020
Způsob publikování: Open access

We use a mean-field-type approximation with a two-particle self-consistency renormalizing the bare interaction to study the low-temperature critical behavior of the one-dimensional Hubbard model near half filling caused by enhanced antiferromagnetic fluctuations. We show that there is a crossover temperature $T_{0}= texp{-1/U ρ(0)}$ below which goes over to strong coupling and approaches a quantum critical point with the diverging staggered susceptibility and a gap in the excitation spectrum at zero temperature.
Trvalý link: http://hdl.handle.net/11104/0315411