Paired chiral spin liquid with a Fermi surface in S=1 model on the triangular lattice
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Senthil_Paired chiral.pdf
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Author(s)
Bieri, Samuel
Serbyn, Maksym
Todadri, Senthil
Lee, Patrick A.
Date Issued
December 2012
Journal
Physical Review B
Publisher
American Physical Society
Citation
Bieri, Samuel et al. “Paired Chiral Spin Liquid with a Fermi Surface in S=1 Model on the Triangular Lattice.” Physical Review B 86.22 (2012). © 2012 American Physical Society
Version
Final published version
Abstract
Motivated by recent experiments on Ba[subscript 3]NiSb[subscript 2]O[subscript 9], we investigate possible quantum spin liquid ground states for spin S=1 Heisenberg models on the triangular lattice. We use variational Monte Carlo techniques to calculate the energies of microscopic spin liquid wave functions where spin is represented by three flavors of fermionic spinon operators. These energies are compared with the energies of various competing three-sublattice ordered states. Our approach shows that the antiferromagnetic Heisenberg model with biquadratic term and single-ion anisotropy does not have a low-temperature spin liquid phase. However, for an SU(3)-invariant model with sufficiently strong ring-exchange terms, we find a paired chiral quantum spin liquid with a Fermi surface of deconfined spinons that is stable against all types of ordering patterns we considered. We discuss the physics of this exotic spin liquid state in relation to the recent experiment and suggest new ways to test this scenario.
MIT Department
MIT Materials Research Laboratory
Lincoln Laboratory
Massachusetts Institute of Technology. Department of Physics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevB.86.224409
