ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
We determined the single particle relaxation time τs and the classical transport scattering time τt out of Shubnikov-de Haas (SdH) measurements at a GaAs-AlGaAs-GaAs double heterostructure consisting of a normal and an inverted interface. As a result we find that even in inverted heterostructures the classical scattering time τt is an order of magnitude larger than the single particle relaxation time τs. From a comparison with theoretical calculations including scattering from remote impurities, interface charges, and interface roughness, we conclude that the mobility in inverted heterostructures at low temperatures is dominated by Coulomb scattering from remote dopants and interface charges in the barrier, rather than interface roughness scattering. Nevertheless, the mobility of the inverted interface turns out to be significantly lower than that of a normal interface.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.349809
