Gapless Fermions and Quantum Order
Strongly Correlated Electrons
2009-11-07 v1 High Energy Physics - Theory
Abstract
Using 2D quantum spin-1/2 model as a concrete example, we studied the relation between gapless fermionic excitations (spinons) and quantum orders in some spin liquid states. Using winding number, we find the projective symmetry group that characterizes the quantum order directly determines the pattern of Fermi points in the Brillouin zone. Thus quantum orders provide an origin for gapless fermionic excitations.
Cite
@article{arxiv.cond-mat/0202166,
title = {Gapless Fermions and Quantum Order},
author = {Xiao-Gang Wen and A. Zee},
journal= {arXiv preprint arXiv:cond-mat/0202166},
year = {2009}
}
Comments
23 pages. LaTeX. Homepage http://dao.mit.edu/~wen