Spin polarons in triangular antiferromagnets
Strongly Correlated Electrons
2009-10-31 v1
Abstract
The motion of a single hole in a 2D triangular antiferromagnet is investigated using the t-J model. The one-hole states are described by strings of spin deviations around the hole. Using projection technique the one-hole spectral function is calculated. For large J/t we find low-lying quasiparticle-like bands which are well separated from an incoherent background by a gap of order J. However, for small J/t this gap vanishes and the spectrum becomes broad over an energy range of several t. The results are compared with SCBA calculations and numerical data.
Cite
@article{arxiv.cond-mat/9811191,
title = {Spin polarons in triangular antiferromagnets},
author = {Matthias Vojta},
journal= {arXiv preprint arXiv:cond-mat/9811191},
year = {2009}
}
Comments
4 pages, 6 figs, to be publish in PRB