Asymmetry of nonlinear transport and electron interactions in quantum dots.
The symmetry properties of transport beyond the linear regime in chaotic quantum dots are investigated experimentally. A component of differential conductance that is antisymmetric in both applied source-drain bias V and magnetic field B, absent in linear transport, is found to exhibit mesoscopic fluctuations around a zero average. Typical values of this component allow a measurement of the electron interaction strength.
Zumbühl
D M
DM
Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
Marcus
C M
CM
Hanson
M P
MP
Gossard
A C
AC