Hopf Term for a Two-Dimensional Electron Gas
Strongly Correlated Electrons
2009-10-30 v1 Mesoscale and Nanoscale Physics
High Energy Physics - Theory
Abstract
In this Comment on the paper by W. Apel and Yu. A. Bychkov, cond-mat/9610040 and Phys. Rev. Lett. 78, 2188 (1997), we draw attention to our prior microscopic derivations of the Hopf term for various systems and to shortcomings of the Apel-Bychkov derivation. We explain how the value of the Hopt term prefactor is expressed in terms of a topological invariant in the momentum space and the quantized Hall conductivity of the system. (See also related paper cond-mat/9703195)
Cite
@article{arxiv.cond-mat/9703228,
title = {Hopf Term for a Two-Dimensional Electron Gas},
author = {G. E. Volovik and V. M. Yakovenko},
journal= {arXiv preprint arXiv:cond-mat/9703228},
year = {2009}
}
Comments
RevTeX, 1 page, no figures