Journal or Book Title
Physics Review Letters
We study different solid phases of 4He, by means of path integral Monte Carlo simulations based on a recently developed worm algorithm. Our study includes simulations that start off from a high-T gas phase, which is then “quenched” down to T=0.2 K. The low-T properties of the system crucially depend on the initial state. While an ideal hcp crystal is a clear-cut insulator, the disordered system freezes into a superglass, i.e., a metastable amorphous solid featuring off-diagonal long-range order and superfluidity.
Boninsegni, M; Prokof'ev, Nikolai; and Svistunov, Boris, "Superglass Phase of 4He" (2006). Physics Review Letters. 1151.
Retrieved from https://scholarworks.umass.edu/physics_faculty_pubs/1151