Chiral mixed phase in disordered 3d Heisenberg models

TL;DR

This paper investigates the phase behavior of a disordered 3D Heisenberg model, revealing a chiral mixed phase and confirming critical properties through Monte Carlo simulations, contributing to understanding spin glass universality.

Contribution

It introduces the discovery of a chiral mixed phase in disordered 3D Heisenberg models and compares its universality class to that of 3D spin glasses.

Findings

Identification of a chiral mixed phase in disordered 3D Heisenberg models

Critical temperature and exponent values match previous high-precision studies in the pure case

Potential universality class similarity between the chiral phase and 3D spin glasses

Abstract

Using Monte Carlo simulations, we compute the spin stiffness of a site-random 3d Heisenberg model with competing ferromagnetic and antiferromagnetic interactions. Our results for the pure limit yield values of the the critical temperature and the critical exponent $\nu$ in excellent agreement with previous high precision studies. In the disordered case, a mixed "chiral" phase is found which may be in the same universality class as 3d Heisenberg spin glasses.