Hot-electron effects in two-dimensional hopping with a large localization length
We have studied nonlinear effects in the resistance of a two-dimensional system with a large localization length on both sides of the crossover from weak to strong localization. It is shown that nonlinearity in the hopping regime is due to electron overheating rather than the field effects. This qualitatively new behavior is a signature of a two-dimensional hopping transport with a large localization length.
Gershenson
ME
Serin Physics Laboratory, Rutgers University, Piscataway, New Jersey 08854-8019, USA.
Khavin
YB
Reuter
D
Schafmeister
P
Wieck
AD