Abstract
The zone folding in the acoustic-phonon dispersion curve of GaAs/AlGaAs superlattices is demonstrated using superconducting tunnel junctions as sources and detectors of quasimonochromatic phonons. We present data on selective transmission of high-frequency phonons due to narrow band reflection determined by the superlattice period.
- Received 1 November 1979
DOI:https://doi.org/10.1103/PhysRevLett.43.2012
©1979 American Physical Society
