Induced supersolidity in a normal and hardcore boson mixture

TL;DR

This paper demonstrates that supersolidity can be induced in a hardcore boson component of a mixture through interspecies interactions, even without long-range interactions in that component.

Contribution

It introduces a novel mechanism for inducing supersolidity in a bosonic mixture without relying on long-range interactions in the target species.

Findings

Supersolid order can be induced in hardcore bosons via interspecies interactions.

Charge density waves emerge in the hardcore component under certain conditions.

The phenomenon occurs in both commensurate and incommensurate density regimes.

Abstract

It is well known that the supersolid form of matter can arise in a single species of cold bosonic atoms in an optical lattice due to long range interactions. We present a scenario where a supersolid is induced in one of the components of a mixture of two species bosonic atoms where there is no long range interactions. We study a system of normal and hardcore boson mixture with only the former possessing long range interactions. We consider three cases: the first where the total density is commensurate and the other two where they are incommensurate . By suitable choices of the densities and the interaction strengths of the atoms, we predict that the charge density wave and the supersolid orders can be induced in the hardcore species as a result of the competing interatomic interactions.