Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
57 (1990), S. 55-57
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
The energy levels of very short-period (GaAs)n-(AlAs)n superlattices (n≤4) were investigated by photoluminescence (PL). The results show that these superlattices are type II but the lowest conduction bands are Xx,y for n≤3 and Xz for n=4, respectively. (Here Xz is the valley with k parallel to the growth axis.) In both cases the X valleys are very close to each other. PL decay, PL excitation, and PL under uniaxial stress confirm this identification. Al0.5Ga0.5As shows very different behavior, showing that even for n=1 our samples are true superlattices.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.103576
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