Algebraic Quantum Spin Liquid from an Exactly Solvable Spin-1/2 Kitaev Model

ORAL

Abstract

We propose an exactly solvable quantum spin-1/2 model with time reversal invariance on a two dimensional brick-wall lattice, where each unit cell consists of three sites. We find that the ground states are algebraic quantum spin liquid states. The spinon excitations are gapless and the energy dispersion is linear around two Dirac points. The ground states are of three-fold topological degen-
eracy on a torus. Breaking the time reversal symmetry opens a bulk energy gap and the Z2 vortices obey non-Abelian statistics.

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Presenters

  • Jian-Jian Miao

    Physics Department, Zhejiang University, Kavli Institute for Theoretical Sciences, University of Chinese Academy of Sciences

Authors

  • Jian-Jian Miao

    Physics Department, Zhejiang University, Kavli Institute for Theoretical Sciences, University of Chinese Academy of Sciences

  • Hui-Ke Jin

    Physics Department, Zhejiang University, Zhejiang University

  • Fu-Chun Zhang

    Kavli Institute of Theoretical Sciences, Kavli Institute for Theoretical Sciences, University of Chinese Academy of Sciences

  • Yi Zhou

    Physics Department, Zhejiang University, Department of Physics, Zhejiang University, Zhejiang University