Optical Control of Topological Quantum Transport in Semiconductors
Mesoscale and Nanoscale Physics
2007-07-24 v2 Materials Science
Abstract
Intense coherent laser radiation red-detuned from absorption edge can reactively activate sizable Hall type charge and spin transport in n-doped paramagnetic semiconductors as a consequence of k-space Berry curvature transferred from valence band to photon-dressed conduction band. In the presence of disorder, the optically induced Hall conductance can change sign with laser intensity.
Keywords
Cite
@article{arxiv.cond-mat/0702346,
title = {Optical Control of Topological Quantum Transport in Semiconductors},
author = {Wang Yao and A. H. MacDonald and Qian Niu},
journal= {arXiv preprint arXiv:cond-mat/0702346},
year = {2007}
}
Comments
to appear in Phys. Rev. Lett