D. W. Horsell et al 2005 Europhys. Lett. 71 658 doi:10.1209/epl/i2005-10115-2
D. W. Horsell1, A. K. Savchenko1, Y. M. Galperin2,3,4, V. I. Kozub3,4, V. M. Vinokur4 and D. A. Ritchie5
Show affiliationsWe 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.
72.20.-i Conductivity phenomena in semiconductors and insulators
Issue 4 (August 2005)
Received 11 March 2005, accepted for publication 16 June 2005, in final form 16 June 2005
Published 13 July 2005
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