PARASTATISTICS OF CHARGED BOSONS PARTLY LOCALIZED BY IMPURITIES

Coulomb repulsion is taken into account to derive the thermodynamics o f charged bosons in a random external potential. A simple analytical f orm of the partition function is proposed for the case of non-overlapp ing localized states (i.e. a small amount of disorder). The density of localized bosons and the specific heat show a peculiar non-uniform te mperature dependence below the Bose-Einstein condensation temperature. The superfluid-Bose-glass phase diagram is discussed. A new phase is predicted which is a Bose glass at T = 0 but a superfluid at finite T.