An entropic simulational study of the spin-1 Baxter–Wu model in a crystal field
Nenhuma Miniatura disponível
Arquivos
Data
2021
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
We investigate the critical behavior of the two-dimensional spin-1 Baxter–Wu model in
a crystal field using entropic sampling simulations, based on the Wang–Landau method,
with the joint density of states. We obtain the temperature–crystal field phase diagram,
which includes a tetracritical line ending at a pentacritical point. A finite-size scaling
analysis of the maximum of the specific heat, while changing the crystal field anisotropy,
is used to obtain a precise location of the pentacritical point. Our results give the critical
temperature and crystal field as Tpc = 0.98030(10) and Dpc = 1.68288(62). We also
detect that at the first-order region of the phase diagram, the specific heat exhibits
a double peak structure as in the Schottky-like anomaly, which is associated with an
order–disorder transition.
Descrição
Palavras-chave
Baxter–Wu model, Entropic sampling simulations, Joint density of states, Pentacritical point, Pentacritical point, Schottky-like anomaly
Citação
JORGE, L. N. et al. An entropic simulational study of the spin-1 Baxter-Wu model in a crystal field. Physica A: statistical mechanics and its application, Amsterdam, v. 576, e126071, 2021. DOI: 10.1016/j.physa.2021.126071. Disponível em: https://www.sciencedirect.com/science/article/pii/S0378437121003447. Acesso em: 11 set. 2023.