Statistical model of a superfluid solid

A microscopic statistical model of a quantum solid is developed, where inside crystalline lattice there can exist regions disorder, such as dislocation networks or grain boundaries. The cores these disorder are allowed for exhibiting fluid-like properties. If the composed Bose atoms, then aggregations exhibit Bose-Einstein condensation and hence superfluidity. randomly distributed throughout sample, so that describing overall properties requires to accomplish averaging over disordered aggregation configurations. procedure results in renormalized Hamiltonian combine crystal possibility combination depends on system parameters. In general, exists range parameters allowing occurrence superfluidity aggregations. This gives opportunity answer which real crystals property cannot.