The ordering of XY spin glasses

TL;DR

This paper investigates the ordering behaviors of XY-like spin-glass magnets with easy-plane anisotropy, revealing persistent spin-chirality decoupling and contrasting scalar and vector chiral orders through symmetry analysis and simulations.

Contribution

It provides new insights into the effects of anisotropy and magnetic fields on XY spin glasses, highlighting the persistence of spin-chirality decoupling.

Findings

Spin-chirality decoupling persists in XY regime with anisotropy.

Contrasts between scalar and vector chiral orders are clarified.

Implications for experimental observations are discussed.

Abstract

Ordering properties of XY-like spin-glass magnets with an easy-plane magnetic anisotropy are studied based on a symmetry consideration and the results of recent numerical simulations on the pure Heisenberg and XY spin-glass models. The effects of an easy-plane-type uniaxial anisotropy, a random magnetic anisotropy and an applied magnetic field are investigated. In the XY regime in zero field, the "spin-chirality decoupling" persists even under the random magnetic anisotropy, escaping the "spin-chirality recoupling" phenomenon which inevitably occurs in the Heisenberg regime. Contrast between the scalar chiral order and the vector chiral order is emphasized. Implications to experiments are discussed.