Supersolid phase with cold polar molecules on a triangular lattice

TL;DR

This paper investigates heteronuclear molecules on a triangular lattice, revealing a rich phase diagram with superfluid, solid, and supersolid phases, and identifies conditions for experimental realization of supersolidity.

Contribution

It introduces a detailed phase diagram for heteronuclear molecules on a triangular lattice, highlighting the feasibility of observing supersolidity experimentally.

Findings

Supersolid phase exists at finite temperature and strong interactions.

Maximum critical temperature for supersolidity is identified.

Feasible experimental conditions for supersolidity are proposed.

Abstract

We study a system of heteronuclear molecules on a triangular lattice and analyze the potential of this system for the experimental realization of a supersolid phase. The ground state phase diagram contains superfluid, solid and supersolid phases. At finite temperatures and strong interactions there is an additional emulsion region, in contrast to similar models with short-range interactions. We derive the maximal critical temperature $T_c$ and the corresponding entropy $S/N = 0.04(1)$ for supersolidity and find feasible experimental conditions for its realization.