Journal or Book Title
Physics Review Letters
The supersolid state of matter, exhibiting nondissipative flow in solids, has been elusive for 35 years. The recent discovery of a nonclassical moment of inertia in solid 4He by Kim and Chan provided the first experimental evidence, although the interpretation in terms of supersolidity of the ideal crystal phase remains a subject to debate. Using quantum Monte Carlo methods we investigate the long-standing question of vacancy-induced superflow and find that vacancies in a 4He crystal phase separate instead of forming a supersolid. On the other hand, nonequilibrium vacancies relaxing on defects of polycrystalline samples could provide an explanation for the experimental observations.
Boninsegni, M; Kuklov, A; Pollet, L; Prokof'ev, Nikolai; Svistunov, Boris; and Troyer, M, "Fate of Vacancy-Induced Supersolidity in 4He" (2006). Physics Review Letters. 1148.
Retrieved from https://scholarworks.umass.edu/physics_faculty_pubs/1148