Effective actions for spin ladders

Thumbnail Image

Date

Authors

Journal Title

Journal ISSN

Volume Title

Publisher

Abstract

Description

We derive a path-integral expression for the effective action in the continuum limit of an AFM Heisenberg spin ladder with an arbitrary number of legs. The map is onto an $O(3)$ nonlinear $σ$-model (NL$σ$M) with the addition of a topological term that is effective only for odd-legged ladders and half-odd integer spins. We derive the parameters of the effective NL$σ$M and the behaviour of the spin gap for the case of even-legged ladders.
Final version, as published in Phys. Rev. Lett

Keywords

Strongly Correlated Electrons

Citation

URI

http://salesiana.dossiersoluciones.com/handle/123456789/217030

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/9610148
 http://arxiv.org/abs/cond-mat/9610148
 Phys.Rev.Lett.78:2457,1997
 doi:10.1103/PhysRevLett.78.2457

Collections

arXiv