Tailoring symmetry groups using external alternate fields

TL;DR

This paper explores how external oscillatory fields can modify the symmetry properties of macroscopic systems, leading to new phases and topological defect structures through a dynamic 'order by disorder' mechanism.

Contribution

It introduces a method to tailor symmetry groups in macroscopic systems using external alternating fields, revealing new phase behaviors and defect topologies.

Findings

Oscillatory fields can induce XY or Ising-like phases in Heisenberg ferromagnets.

Anisotropies can be compensated, altering the ordered phase.

Dynamic symmetry tuning affects defect topology.

Abstract

Macroscopic systems with continuous symmetries subjected to oscillatory fields have phases and transitions that are qualitatively different from their equilibrium ones. Depending on the amplitude and frequency of the fields applied, Heisenberg ferromagnets can become XY or Ising-like -or, conversely, anisotropies can be compensated -thus changing the nature of the ordered phase and the topology of defects. The phenomena can be viewed as a dynamic form of "order by disorder".