Optical Control of Topological Quantum Transport in Semiconductors

Details Optical Control of Topological Quantum Transport in Semiconductors Optical Control of Topological Quantum Transport in Semiconductors

2007-02-15

arxiv.org/abs/cond-mat/0702346v2

Phys. Rev, Lett. 99, 047401 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.99.047401

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.

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