Quantum dimer model for the spin-1/2 kagome Z2 spin liquid
journal contributionposted on 2018-08-07, 15:48 authored by Ioannis RousochatzakisIoannis Rousochatzakis, Yuan Wan, O. Tchernyshyov, Frederic Mila
We revisit the description of the low-energy singlet sector of the spin-1/2 Heisenberg antiferromagnet on kagome in terms of an effective quantum dimer model. With the help of exact diagonalizations of appropriate finite-size clusters, we show that the embedding of a given process in its kagome environment leads to dramatic modifications of the amplitudes of the elementary loop processes, an effect not accessible to the standard approach based on the truncation of the Hamiltonian to the nearest-neighbor valence-bond basis. The resulting parameters are consistent with a Z2 spin liquid rather than with a valence-bond crystal, in agreement with the last density matrix renormalization group results.
Published inPhysical Review B - Condensed Matter and Materials Physics
CitationROUSOCHATZAKIS, I. ... et al, 2014. Quantum dimer model for the spin-1/2 kagome Z2 spin liquid. Physical Review B, 90 (10), 100406(R).
Publisher© American Physical Society
- AM (Accepted Manuscript)
Publisher statementThis work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/
NotesThis paper was published in the journal Physical Review B and the definitive published version is available at https://doi.org/10.1103/PhysRevB.90.100406.