Abstract
Resonant magnetotunneling in double barrier structures is used to demonstrate that the effective mass of confined conduction electrons becomes anisotropic when an electric field is applied perpendicular to the interfaces. Although several authors have previously reported -related optical anisotropy, this is the first example of a corresponding electrical anisotropy. The results are explained using a quantum mechanical model involving interface band mixing that contains additional features not found in the optical case.
- Received 6 April 2001
DOI:https://doi.org/10.1103/PhysRevLett.88.056403
©2002 American Physical Society