Optical Control of Topological Quantum Transport in Semiconductors
arXiv:cond-mat/0702346 · doi:10.1103/PhysRevLett.99.047401
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.
to appear in Phys. Rev. Lett