A symbiotic nondipolar droplet supersolid in a binary dipolar-nondipolar Dy-Rb mixture

TL;DR

This paper demonstrates the formation of symbiotic nondipolar droplet supersolids in a binary Dy-Rb mixture, revealing two types of such states influenced by interspecies attraction and specific scattering lengths, using numerical mean-field models.

Contribution

It introduces a novel binary mean-field model with Lee-Huang-Yang interactions to predict symbiotic nondipolar droplet supersolids in Dy-Rb mixtures, highlighting new states of matter.

Findings

Two types of symbiotic nondipolar droplet supersolids identified.

Interspecies attraction leads to overlapping supersolid droplets.

Specific scattering lengths determine the emergence of these supersolids.

Abstract

We demonstrate the formation of two types of symbiotic nondipolar droplet supersolid in a binary dipolar-nondipolar mixture with an interspecies atraction, where the dipolar (nondipolar) atoms are trapped (untrapped). In the absence of an interspecies attraction, in the first type, a dipolar droplet supersolid exists, whereas in the second type, there are no droplets in the dipolar component. To illustrate, we consider a $^{164}$Dy-$^{87}$Rb mixture, where the untrapped $^{87}$Rb supersolid sticks to the trapped $^{164}$Dy supersolid due to the interspecies attraction and forms a symbiotic supersolid with overlapping droplets. The first (second) type of symbiotic supersolid emerges for the scattering length $ a_1=85a_0$ ($a_1=95a_0$) of $^{164}$Dy atom, while under an appropriate trap a dipolar droplet supersolid exists (does not exist) for no interspecies interaction, where $a_0$ the Bohr radius. This study is based on the numerical solution of an improved binary mean-field model, where we introduce an intraspecies Lee-Huang-Yang interaction in the dipolar component, which stops a dipolar collapse and forms a dipolar supersolid.To observe this symbiotic droplet supersolid, one should prepare the corresponding fully trapped dipolar-nondipolar supersolid and then remove the trap on the nondipolar atoms.