Gq. Hai et al., INTERSUBBAND-COUPLING AND SCREENING EFFECTS ON THE ELECTRON-TRANSPORTIN A QUASI-2-DIMENSIONAL S-DOPED SEMICONDUCTOR SYSTEM, Journal of applied physics, 80(10), 1996, pp. 5809-5814
The effects due to intersubband coupling and screening on the ionized
impurity scattering are studied for a quasi-two-dimensional electron s
ystem in delta-doped semiconductors. We found that intersubband coupli
ng plays an essential role in describing the screening properties and
the effect of ionized impurity scattering on the mobility in a multisu
bband system. At the onset of the occupation of a higher subband, the
screening due to the intersubband coupling leads to a reduction of the
small angle scattering rate in the lower subband. We showed that such
an effect is significant in a delta-doped quantum well and results in
a pronounced increase of the quantum mobility at the onset of the occ
upation of a higher subband. (C) 1996 American Institute of Physics.