Abstract
We report the observation of resonant magnetotunneling between states of different effective mass derived from zone center () and zone boundary () points of the Brillouin zone in single-barrier GaAs/AlAs/GaAs heterostructures. Resonances arise in the conductance-bias characteristics for both Landau level index conserving () and nonconserving transfer (). For resonances, structure with a splitting proportional to the difference in the cyclotron frequencies () is observed, while for transitions a smaller splitting corresponding to is reflected. Analysis of these features enables the transverse () effective mass in AlAs to be determined. Clear evidence for conserving and nonconserving transfer in the elastic transfer process is reported.
- Received 17 May 1996
DOI:https://doi.org/10.1103/PhysRevB.54.R5251
©1996 American Physical Society