Edge Magnetic Field in the xxz Spin-1/2 Chain
Strongly Correlated Electrons
2009-10-30 v2 High Energy Physics - Theory
Abstract
The critical behavior associated with a transverse magnetic field applied at the edge of a semi-infinite xxz S=1/2 chain is calculated using field theory techniques. Contrary to a recent claim, we find that the long-time behavior is given by a renormalization group fixed point corresponding to an infinite field which polarizes the spin at the edge. The zero temperature entropy and position-dependent magnetization are calculated.
Keywords
Cite
@article{arxiv.cond-mat/9710221,
title = {Edge Magnetic Field in the xxz Spin-1/2 Chain},
author = {Ian Affleck},
journal= {arXiv preprint arXiv:cond-mat/9710221},
year = {2009}
}
Comments
5 pages, further result added, to appear in J. Phys. A