Z_3 Quantum Criticality in a spin-1/2 chain model
Strongly Correlated Electrons
2009-11-10 v2
Abstract
The stability of the magnetization plateau phase of the XXZ spin-1/2 Heisenberg chain with competing interactions is investigated upon switching on a staggered transverse magnetic field. Within a bosonization approach, it is shown that the low-energy properties of the model are described by an effective two-dimensional XY model in a three-fold symmetry-breaking field. A phase transition in the three-state Potts universality class is expected separating the plateau phase to a phase where the spins are polarized along the staggered magnetic field. The Z critical properties of the transition are determined within the bosonization approach.
Cite
@article{arxiv.cond-mat/0309345,
title = {Z_3 Quantum Criticality in a spin-1/2 chain model},
author = {P. Lecheminant and E. Orignac},
journal= {arXiv preprint arXiv:cond-mat/0309345},
year = {2009}
}
Comments
5 pages, revised version