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Quantum size effects in thin metal films

Authors
Journal
Physica
0031-8914
Publisher
Elsevier
Publication Date
Volume
59
Issue
3
Identifiers
DOI: 10.1016/0031-8914(72)90203-0
Disciplines
  • Physics

Abstract

Abstract The absorption of electromagnetic radiation by a thin isotropic metal film is expected to become resonant for two equidistant sets of frequencies as a result of the size quantization. The amplitudes of these resonances are shown to be comparable to the background absorption for values of the film thickness up to about 1500 Å if the film is sufficiently pure (relaxation time ф≳10 −11 s ). Effects which are due to static magnetic fields are investigated. If perpendicular to th surface, the field causes a shift of the resonant frequencies by an amount ω c, provided the electromagnetic field is circularly polarized (ω c is the cyclotron frequency). The frequencies increase monotonically with a weak applied magnetic field B parallel to the surface, and become proportional to B 2 3 for larger values of B.

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