Journal article
Fractionalized quantum spin Hall effect
Abstract
Effects of electron correlations on a two-dimensional quantum spin Hall (QSH) system are studied. We examine possible phases of a generalized Hubbard model on a bilayer honeycomb lattice with a spin-orbit coupling and short-range electron-electron repulsions at half filling, based on the slave-rotor mean-field theory. Besides the conventional QSH phase and a broken-symmetry insulating phase, we find a third phase, a fractionalized quantum spin …
Authors
Young MW; Lee S-S; Kallin C
Journal
Physical Review B, Vol. 78, No. 12,
Publisher
American Physical Society (APS)
Publication Date
September 15, 2008
DOI
10.1103/physrevb.78.125316
ISSN
2469-9950