2022/05/20 by Wu, Jimin
#Disordered Systems and Neural Networks (cond-mat.dis-nn) #FOS: Physical sciences #Statistical Mechanics (cond-mat.stat-mech)
paper · doi:10.48550/arxiv.2206.01811
A toy model for ferroic orders through entropy. As the rod/spin concentration (or the volume enclosing the ferroic rods) is variable by a tunable force conjugate to the order parameter, the model exhibits hysteresis associated to some discontinuous isotropic-nematic transitions explained essentially by Onsager's hard-rod model. The uniaxial anisotropy and nonperiodicity by construction is reminiscent of Stoner-Wohlfarth's single-domain magnet, and the toy model may ultimately be seen as a minimalistic for hard ferroics with some possible self-averaging disorders. Spin togglings shall be reliable due to the clean two-well energy landscapes in the athermal transition theory.