Short-time behavior of a classical ferromagnet with double-exchange interaction

TL;DR

This paper studies the early-time critical dynamics of a classical ferromagnet with double-exchange interaction using Monte Carlo simulations, estimating critical exponents and confirming universality class membership.

Contribution

It provides new estimates of dynamic and static critical exponents for the model, supporting its universality with the classical Heisenberg model.

Findings

Estimated dynamic critical exponents $z$ and $ heta$

Estimated static critical exponents $ u$ and $eta$

Confirmed universality class with classical Heisenberg model

Abstract

We investigate the critical dynamics of a classical ferromagnet on the simple cubic lattice with double-exchange interaction. Estimates for the dynamic critical exponents $z$ and $\theta$ are obtained using short-time Monte Carlo simulations. We also estimate the static critical exponents $\nu$ and $\beta$ studying the behavior of the samples at an early time. Our results are in good agreement with available estimates and support the assertion that this model and the classical Heisenberg model belong to the same universality class.