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Stripes, topological order, and deconfinement in a planar t-J(z) model
KTH, Superseded Departments, Physics.
2004 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 93, no 6, 067201- p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2004. Vol. 93, no 6, 067201- p.
National Category
Condensed Matter Physics
URN: urn:nbn:se:kth:diva-41168DOI: 10.1103/PhysRevLett.93.067201ISI: 000223138200045ScopusID: 2-s2.0-69649108705OAI: diva2:443727
QC 20110926Available from: 2011-09-26 Created: 2011-09-23 Last updated: 2011-09-26Bibliographically approved

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