Field-induced incommensurate order for the quasi-one-dimensional XXZ model in a magnetic field

TL;DR

This study explores phase transitions in a quasi-one-dimensional XXZ model under magnetic fields, revealing incommensurate and staggered orders, and discusses implications for experimental observations in BaCo2V2O8.

Contribution

It combines bosonization and mean field methods to analyze field-induced phase transitions in the XXZ model, providing new insights into incommensurate order phenomena.

Findings

Incommensurate order occurs at low magnetic fields.

Transverse staggered order appears at high magnetic fields.

Results relate to experimental phase transitions in BaCo2V2O8.

Abstract

We investigate phase transitions of the quasi-one-dimensional XXZ model in a magnetic field, using the bosonization combined with the mean field treatment of the inter-chain interaction. We then find that the field induced incommensurate order is certainly realized in the low field region, while the transverse staggered order appears in the high field region. On the basis of the result, we discuss the field-induced phase transition recently observed for BaCo2V2O8.