ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Electron transport is studied in GaAs/AlGaAs asymmetric triple-barrier resonant tunneling structures in a high magnetic field perpendicular to the interfaces. Besides the resonance peaks arising from tunneling between two quantum wells, a series of fine structure is observed in the valley region of the current-voltage characteristics, which is attributed to electron transitions between well defined totally quantized levels (Landau levels) in the two wells, together with the emission of a longitudinal optical phonon. In the voltage region of the main current peak, any structures which shift with magnetic field are not observed, suggesting that the tunneling in this bias region is mainly determined by Δn=0 elastic transitions.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.105348
Permalink