- Letter
Landau free energy of small clusters beyond mean-field approach
Phys. Rev. E 110, L012101 – Published 10 July, 2024
DOI: https://doi.org/10.1103/PhysRevE.110.L012101
Abstract
Landau free energy determines the landscape of order parameter fluctuations that occur in a physical system at thermal equilibrium and, in particular, characterizes the critical phenomena. We propose a semianalytical approach based on the fluctuating local field method, which allows us to estimate Landau free energy for small clusters with discrete (Ising model) and continuous (Heisenberg model) order parameter.
