Bose-Einstein condensation vs. localization of bosonic quasiparticles in disordered weakly-coupled dimer antiferromagnets
Tommaso Roscilde, Stephan Haas
Abstract
We investigate the field-induced insulator-to-superfluid transition of bosonic quasiparticles in S=1/2 weakly-coupled dimer antiferromagnets. In presence of realistic disorder due to site dilution of the magnetic lattice, we show that the system displays an extended Bose-glass phase characterized by the localization of the hard-core quasiparticles.
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