Spin-liquid condensate of spinful bosons

Spin-liquid condensate of spinful bosons

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...

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Veröffentlicht in:Physical review letters 2014-08, Vol.113 (8), p.080402-080402, Article 080402
Hauptverfasser: Lian, Biao, Zhang, Shoucheng
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Bosons
Charge
Condensates
Energy gap
Phase diagrams
Preserves
Symmetry
Wave functions
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description 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.
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source American Physical Society Journals
subjects Bosons
Charge
Condensates
Energy gap
Phase diagrams
Preserves
Symmetry
Wave functions
title Spin-liquid condensate of spinful bosons
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