Rectification currents in two-dimensional artificial channels.
Driven transport of noninteracting Brownian particles in two-dimensional asymmetric channels is investigated by fully accounting for longitudinal and transverse diffusions. Bona fide two-dimensional rectification effects are reported, which cannot be explained by an approximate Fick-Jacobs kinetics, such as the characteristic curve of the current pumped by a transverse ac bias and the selective gating exerted by a transverse ac bias on a driven longitudinal current. Possible experimental demonstrations of these effects in superconducting devices are also discussed.
Marchesoni
Fabio
F
Dipartimento di Fisica, Università di Camerino, I-62032 Camerino, Italy and Department of Physics, Loughborough University, Loughborough LE11 3TU, United Kingdom.
Savel'ev
Sergey
S