Features of the Domain Boundaries of a Highly Anisotropic (S = 1) Antiferromagnet near the Transition to the Quantum Paramagnet Phase

TL;DR

This paper investigates how the structure of antiphase domain boundaries in a highly anisotropic S=1 antiferromagnet varies with the single-ion anisotropy parameter D, revealing phase-dependent boundary structures through computer modeling.

Contribution

It provides new insights into the dependence of domain boundary structures on anisotropy in a highly anisotropic antiferromagnet near quantum phase transitions.

Findings

Boundary structures change significantly with D

Identifies intermediate QP-XY phase effects

Uses large-scale computer modeling

Abstract

It is shown that the structure of antiphase domain boundaries in the antiferromagnetic (AFM) phase of a highly anisotropic magnet with S = 1 on a two-dimensional square lattice depends greatly on single-ion anisotropy parameter D. Computer modeling on large square lattices illustrates the changes in the boundary structure from the quantum paramagnet (QP) to the XY phase, including the intermediate QP-XY phase at fairly small variations in positive D.