Spontaneous current generation in gated nanostructures

Details Spontaneous current generation in gated nanostructures Spontaneous current generation in gated nanostructures

2004-11-24

arxiv.org/abs/cond-mat/0411606v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1209/epl/i2005-10115-2

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 depend upon the voltage applied to the gate. We propose that it is initiated by the injection of hot electrons from the gate that relax via phonon emission. The phonons then excite secondary electrons from asymmetrically distributed impurities in the channel, which leads to the observed current.

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