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Stripes, topological order, and deconfinement in a planar t-Jz model

J. Smakov·C. D. Batista·G. Ortiz
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Abstract

We determine the quantum phase diagram of a two-dimensional bosonic t-Jz 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-Jz models become equivalent in the limit of small gamma. In this limit, the ground state represents a static stripe phase characterized by a non-zero 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 Jz/t.

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J. Smakov, C. D. Batista, G. Ortiz. 2004-08-17. Stripes, topological order, and deconfinement in a planar t-Jz model. https://doi.org/10.1103/physrevlett.93.067201

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