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- Smakov, Jurij, et al.
(författare)
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Stripes, topological order, and deconfinement in a planar t-J(z) model
- 2004
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Ingår i: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 93:6, s. 067201-
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Tidskriftsartikel (refereegranskat)abstract
- We determine the quantum phase diagram of a two-dimensional bosonic t-J(z) model as a function of the lattice anisotropy gamma, using a quantum Monte Carlo loop algorithm. We show analytically that the low-energy sectors of the bosonic and the fermionic t-J(z) models become equivalent in the limit of small gamma. In this limit, the ground state represents a static stripe phase characterized by a nonzero value of a topological order parameter. This phase remains up to intermediate values of gamma, where there is a quantum phase transition to a phase-segregated state or a homogeneous superfluid with dynamic stripe fluctuations depending on the ratio J(z)/t.
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