Quantum Phase Transition in Frustrated Two-Dimensional Antiferromagnets

TL;DR

This paper investigates the quantum phase transition in frustrated two-dimensional antiferromagnets, analyzing universal scaling behaviors and comparing theoretical models with numerical data, to deepen understanding of quantum disordered phases.

Contribution

It provides a detailed field-theoretic analysis of the quantum transition, deriving universal scaling forms and comparing different models with numerical results.

Findings

Universal scaling forms for observables derived

Comparison with numerical data on triangular antiferromagnet

Insights into confined spinon field-theory properties

Abstract

We study frustrated, two-dimensional, quantum antiferromagnets in the vicinity of a quantum transition from a non-collinear, magnetically-ordered ground state to a quantum disordered phase. The general scaling properties of this transition are described. A detailed study of a particular field-theoretic model of the transition, with bosonic spin-1/2 spinon fields, is presented. Explicit universal scaling forms for a variety of observables are obtained and the results are compared with numerical data on the spin-1/2 triangular antiferromagnet. Universal properties of an alternative field-theory, with confined spinons, are also briefly noted.