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