Small density electron gas in a random potential is considered. It is shown that strong electric field creates traps for electrons from fluctuations of random potential. As a result conductivity exponentially decreases with increasing electric field and negative differential conductivity (NDC) arises. This mechanism of NDC may explain some cases of recombination instability observed in strongly compensated semiconductors.
|Original language||English (US)|
|Number of pages||5|
|Journal||Solid State Communications|
|State||Published - Jul 1988|