Quantum spin liquid in interacting Kane-Mele model with staggered on-site potential
Department of Physics, Beijing Normal University, Beijing 100875, P.R. China
Received: 27 June 2012
Received in final form: 13 November 2012
Published online: 28 January 2013
In this paper, we mainly study the magnetic properties of the interacting Kane-Mele model with staggered on-site potential. Due to the absence of spin rotation symmetry, there exists a spin anisotropic energy term in the effective nonlinear σ model (NLσM). Based on the NLσM with spin anisotropic energy term, we derive a complex phase diagram and find that there exist quantum spin liquid states at the moderate coupling region.
Key words: Solid State and Materials
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag, 2013