Limiting current density in a crossed-field nanogap.
Using a mean-field theory, we have studied the quantum extension on the limiting current density in a crossed-field nanogap. When the gap spacing is less than the electron wavelength, our results show that the limiting current density is increased by a large factor from the classical values due to the effects of electron tunneling. The effects of the external magnetic field diminish with a decrease of gap spacing. Smooth transition from the classical regime to the quantum regime is demonstrated.
Ang
L K
LK
Applied Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Kwan
T J
TJ
Lau
Y Y
YY