Quantum and thermal transitions out of the supersolid phase of a 2D quantum antiferromagnet

TL;DR

This study uses quantum Monte Carlo simulations to explore the complex phase diagram of a 2D quantum antiferromagnet, focusing on the supersolid phase and its quantum and thermal transitions, with implications for magnetic materials.

Contribution

It provides a detailed mapping of the phase diagram and characterizes the quantum and thermal transitions out of the supersolid phase in a 2D quantum antiferromagnet.

Findings

Rich phase diagram with extended supersolid region

Identification of quantum and thermal transition points

Implications for field-induced magnetization plateau materials

Abstract

We investigate the thermodynamic properties of a field-induced supersolid phase in a 2D quantum antiferromagnet model. Using quantum Monte Carlo simulations, a very rich phase diagram is mapped out in the temperature - magnetic field plane, with an extended supersolid region where a diagonal (solid) order coexists with a finite XY spin stiffness (superfluid). The various quantum and thermal transitions out of the supersolid state are characterized. Experimental consequences in the context of field-induced magnetization plateau materials are briefly discussed.