title: Coherent Hall effect in a semiconductor superlattice.
abstract: 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.
authors.affiliation: Physikalisches Institut, J. W. Goethe-Universität, Robert-Mayer-Strasse 2-4, 60054 Frankfurt (M), Germany.
authors.forename: Tobias
authors.initials: T
authors.lastname: Bauer
authors.forename: Johanna
authors.initials: J
authors.lastname: Kolb
authors.forename: Anne Beate
authors.initials: AB
authors.lastname: Hummel
authors.forename: Hartmut G
authors.initials: HG
authors.lastname: Roskos
authors.forename: Yuriy
authors.initials: Y
authors.lastname: Kosevich
authors.forename: Klaus
authors.initials: K
authors.lastname: Köhler