title: Spin-liquid condensate of spinful bosons.
abstract: We introduce the concept of a bosonic spin liquid condensate (SLC), where spinful bosons in a lattice form a zero-temperature spin disordered charge condensate that preserves the spin rotation symmetry, but breaks the U(1) symmetry due to a spinless order parameter with charge one. It has an energy gap to all the spin excitations. We show that such SLC states can be realized in a system of spin S ≥ 2 bosons. In particular, we analyze the SLC phase diagram in the spin 2 case using a mean-field variational wave function method. We show there is a direct analogy between the SLC and the resonating-valence-bond state.
authors.affiliation: Department of Physics, McCullough Building, Stanford University, Stanford, California 94305-4045, USA.
authors.forename: Biao
authors.initials: B
authors.lastname: Lian
authors.affiliation: Department of Physics, McCullough Building, Stanford University, Stanford, California 94305-4045, USA.
authors.forename: Shoucheng
authors.initials: S
authors.lastname: Zhang