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Coherent hall effect in a semiconductor superlattice

Kohärenter Halleffekt in einem Halbleiter Übergitter
: Bauer, T.; Kolb, J.; Hummel, A.B.; Roskos, H.G.; Kosevich, Y.; Köhler, K.


Physical review letters 88 (2002), No.8, Art. 086801, 4 pp.
ISSN: 0031-9007
ISSN: 1079-7114
Journal Article
Fraunhofer IAF ()
III-V Halbleiter; III-V semiconductor; superlattice; Übergitter; optical measurement; optische Messung

The coherent Hall effect denotes the transient Hall response of impulsively excited coherent charge-carrier wave packets in a solid. We report the first experimental study of this phenomenon (i) using a semiconductor superlattice in crossed electric and magnetic fields as a model for three-dimensional materials and (ii) employing a contactless optoelectronic technique to probe the transient currents. Two field regimes with distinctly different oscillatory wave packet dynamics are found, separated from each other by a transition region where all oscillations are suppressed.