G. Koren, A. Gupta, et al.
Physica C: Superconductivity and its applications
Using x-ray scattering, we have made the first observations of the spectrum of acousto-electrically amplified phonons in the quantum limit, where the conduction-electron system obeys quantum statistics and the observed phonon wave vector q is comparable to the electron Fermi wave vector kF. In GaAs samples with degenerate carrier distributions, we observe a dramatic quantum anomaly consisting of an abrupt decrease in phonon gain for q larger than 2kF. © 1971 The American Physical Society.
G. Koren, A. Gupta, et al.
Physica C: Superconductivity and its applications
P.A. Lebwohl, D.G. Carlson, et al.
Journal of Applied Physics
R. Gross, A. Gupta, et al.
Applied Physics Letters
T.F. Kuech, A. Segmüller, et al.
Journal of Applied Physics