ELECTRON-MOBILITY IN GAAS DUE TO PIEZOELECTRIC SCATTERING

Theoretical studies so far on piezoelectric scattering have resulted i n a mobility behaviour of mu similar to T--1/2 in which mu continues t o fall indefinitely with increasing temperature T. Such a behaviour ca nnot tell us where this scattering will become unimportant, as might b e expected on physical grounds, The correct behaviour should be a fall ing curve first, followed by a gradually increasing one when the scatt ering ceases to be effective. In this work, by using the force-force c orrelation function technique within the linear response formalism, we obtained a mu versus T curve that shows just this behaviour.