Critical Plasmons of a Quasiperiodic Semiconductor Superlattice
- 21 July 1986
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 57 (3) , 380-383
- https://doi.org/10.1103/physrevlett.57.380
Abstract
We study the plasma excitations of an array of two-dimensional electron-gas layers arranged in a Fibonacci sequence. The plasmon spectrum is analyzed by a transfer-matrix method. It is shown that the spectrum is always "critical," i.e., it corresponds to neither extended nor localized plasmon states. This property is reflected in the calculated Raman intensities.Keywords
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