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Exact chiral spin liquid with stable spin Fermi surface on the kagome lattice

Victor Chua, Hong Yao, and Gregory A. Fiete
Phys. Rev. B 83, 180412(R) – Published 17 May 2011

Abstract

We study an exactly solvable quantum spin model of Kitaev type on the kagome lattice. We find a rich phase diagram which includes a topological (gapped) chiral spin liquid with gapless chiral edge states, and a gapless chiral spin liquid phase with a spin Fermi surface. The ground state of the current model contains an odd number of electrons per unit cell, which qualitatively distinguishes it from previously studied exactly solvable models with a spin Fermi surface. Moreover, we show that the spin Fermi surface is stable against weak perturbations.

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  • Received 12 October 2010

DOI:https://doi.org/10.1103/PhysRevB.83.180412

©2011 American Physical Society

Authors & Affiliations

Victor Chua1, Hong Yao2,3, and Gregory A. Fiete1

  • 1Department of Physics, The University of Texas at Austin, Austin, Texas 78712, USA
  • 2Department of Physics, University of California, Berkeley, California 94720, USA
  • 3Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

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Issue

Vol. 83, Iss. 18 — 1 May 2011

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