Searching for and investigating supersolids is a long-term outstanding problem in physics. In
addition to the solid element He 4 and cold atoms as potential candidates for the supersolid …

We show that the five possible ordered states in a two-dimensional quantum spin-1/2 system
with long-range exchange interactions (Néel, ladder, Peierls, longitudinal-domain, and …

The resonant period drop observed at low temperatures in torsional oscillators containing
solid helium had been interpreted as a signature of a supersolid. However, it was found that …

In this mini-review, we briefly summarize some of the main concepts and ideas behind
highly dilute self-bound quantum droplets of both binary and dipolar character. The latter …

Superlubricity means non-sticky and frictionless when two bodies are set contacting motion.
Although this occurrence has been extensively investigated since 1859 when Faraday firstly …

The supersolid phase characterized by the superfluid and long-range spatial periodicity of
crystalline order is central to many branches of science ranging from condensed matter …

We revisited the phase diagram of the second layer of He 4 on top of graphite using
quantum Monte Carlo methods. Our aim was to explore the existence of the novel phases …

Measurements that document a number of the characteristics of^ 4 He 4 He mass flux
through a cell filled with solid^ 4 He 4 He carried out at the University of Massachusetts and …

Significant experimental progress has been made recently for observing long-sought
supersolidlike states in Bose-Einstein condensates, where spatial translational symmetry is …

The compound SmB 6 is a Kondo insulator, where the lowest-energy bulk electronic
excitations are spin-excitons. It also has surface states that are subjected to strong spin-orbit …