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• W1988518739 abstract "We obtain the phase diagram of a Bose-Fermi mixture of hardcore spinless bosons and spin-polarized fermions with nearest-neighbor intraspecies interaction and on-site interspecies repulsion in an optical lattice at half filling using a slave-boson mean-field theory. We show that such a system can have four possible phases which are (a) supersolid bosons coexisting with fermions in the Mott state, (b) Mott state of bosons coexisting with fermions in a metallic or charge-density wave state, (c) a metallic fermionic state coexisting with superfluid phase of bosons, and (d) Mott insulating state of fermions and bosons. We chart out the phase diagram of the system and provide analytical expressions for the phase boundaries within mean-field theory. We demonstrate that the transitions between these phases are generically first order with the exception of that between the supersolid and the Mott states which, within mean-field theory, is a continuous quantum phase transition. We also obtain the low-energy collective excitations of the system in these phases. Finally, we study the particle-hole excitations in the Mott insulating phase and use it to determine the dynamical critical exponent $z$ for the supersolid-Mott insulator transition. We discuss experiments which can test our theory." @default.
• W1988518739 created "2016-06-24" @default.
• W1988518739 creator A5050483101 @default.
• W1988518739 creator A5079144405 @default.
• W1988518739 date "2009-03-24" @default.
• W1988518739 modified "2023-09-27" @default.
• W1988518739 title "Phases and collective modes of a hardcore Bose-Fermi mixture in an optical lattice" @default.
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• W1988518739 doi "https://doi.org/10.1103/physrevb.79.115124" @default.
• W1988518739 hasPublicationYear "2009" @default.
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