Zero energy Majorana modes in spin ladders and a possible realization of the Kitaev model
Strongly Correlated Electrons
2015-05-28 v2 Mesoscale and Nanoscale Physics
Quantum Physics
Abstract
We show that in double-chain Mott insulators (ladders), disordered alternating ionic potentials may locally destroy coherence of magnetic excitations and lead to the appearance of spontaneously dimerized islands inside the Haldane spin-liquid phase. We argue that a boundary between the dimerized and Haldane phases of a spin-1/2 ladder supports a localized zero-energy Majorana fermion mode. Based on these findings we suggest a realization of a generalized Kitaev model where Majorana fermions can propagate in more than one dimension.
Keywords
Cite
@article{arxiv.1105.5835,
title = {Zero energy Majorana modes in spin ladders and a possible realization of the Kitaev model},
author = {A. A. Nersesyan and A. M. Tsvelik},
journal= {arXiv preprint arXiv:1105.5835},
year = {2015}
}
Comments
5 pages, 2 figures