Spinons in a Crossed-Chains Model of a 2D Spin Liquid
Strongly Correlated Electrons
2009-11-07 v3
Abstract
Using Random Phase Approximation, we show that a crossed-chains model of a spin-1/2 Heisenberg spins, with frustrated interchain couplings, has a non-dimerized spin-liquid ground state in 2D, with deconfined spinons as the elementary excitations. The results are confirmed by a bosonization study, which shows that the system is an example of a `sliding Luttinger liquid'. In an external field, the system develops an incommensurate field-induced long range order with a finite transition temperature.
Cite
@article{arxiv.cond-mat/0106260,
title = {Spinons in a Crossed-Chains Model of a 2D Spin Liquid},
author = {Oleg A. Starykh and Rajiv R. P. Singh and Gregory C. Levine},
journal= {arXiv preprint arXiv:cond-mat/0106260},
year = {2009}
}
Comments
4 pages, 3 figures; added references; scaling analysis, preserving spin rotational invariance, is extended to finite temperature