TY - JOUR
T1 - Enlarged magnetic focusing radius of photoinduced currents in mesoscopic circuits
AU - Stallhofer, Markus
AU - Kastl, Christoph
AU - Brändlein, Marcel
AU - Schuh, Dieter
AU - Wegscheider, Werner
AU - Kotthaus, Jörg P.
AU - Abstreiter, Gerhard
AU - Holleitner, Alexander W.
PY - 2012/9/10
Y1 - 2012/9/10
N2 - We use GaAs-based quantum point contacts as mesoscopic detectors to analyze the flow of photogenerated electrons in a two-dimensional electron gas at a perpendicular magnetic field. Whereas charge transport experiments always measure the classical cyclotron radius, we show that this changes dramatically when detecting the photoinduced nonequilibrium current in magnetic fields. The radius of the photocurrent flow patterns surprisingly exceeds the classical cyclotron value by far, both in experiment and Monte Carlo simulations. We identify electron-electron scattering as the underlying reason.
AB - We use GaAs-based quantum point contacts as mesoscopic detectors to analyze the flow of photogenerated electrons in a two-dimensional electron gas at a perpendicular magnetic field. Whereas charge transport experiments always measure the classical cyclotron radius, we show that this changes dramatically when detecting the photoinduced nonequilibrium current in magnetic fields. The radius of the photocurrent flow patterns surprisingly exceeds the classical cyclotron value by far, both in experiment and Monte Carlo simulations. We identify electron-electron scattering as the underlying reason.
UR - http://www.scopus.com/inward/record.url?scp=84866396834&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.86.115315
DO - 10.1103/PhysRevB.86.115315
M3 - Article
AN - SCOPUS:84866396834
SN - 1098-0121
VL - 86
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 11
M1 - 115315
ER -