Short-time dynamics of a family of XY noncollinear magnets

TL;DR

This study uses Monte Carlo simulations to analyze the short-time dynamics of 3D XY antiferromagnetic models, identifying the nature of phase transitions and confirming their weak first-order character.

Contribution

It demonstrates how short-time dynamic analysis can distinguish between weak first-order and second-order phase transitions in XY antiferromagnetic systems.

Findings

Identified the critical point via power law behavior of the order parameter.

Measured critical exponents for the phase transition.

Confirmed the weak first-order nature of the transition.

Abstract

Critical scaling and universality in the short-time dynamics for antiferromagnetic models on a three-dimensional stacked triangular lattice are investigated using Monte Carlo simulation. We have determined the critical point by searching for the best power law for the order parameter as a function of time and measured the critical exponents. Our results indicate that it is possible to distinguish weak first-order from second-order phase transitions and confirm that XY antiferromagnetic systems undergo a (weak) first order phase transition.