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cond-mat.mes-hall2004
Coulomb-Blockade directional coupler
P. Pingue, V. Piazza, F. Beltram +3
A tunable directional coupler based on Coulomb Blockade effect is presented. Two electron waveguides are coupled by a quantum dot to an injector waveguide. Electron confinement is…
cond-mat.mes-hall2004
Spontaneous current generation in gated nanostructures
D. W. Horsell, A. K. Savchenko, Y. M. Galperin +3
We have observed an unusual dc current spontaneously generated in the conducting channel of a short-gated GaAs transistor. The magnitude and direction of this current critically de…