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Magnetic levels in superlattices

✍ Scribed by J.C. Maan

Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
501 KB
Volume
2
Category
Article
ISSN
0749-6036

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✦ Synopsis

A magnetic field parallel to the layers of a GaAs-GaAlAs superlattice leads to a quantisation of the subband dispersion relation. The discrete energy levels are calculated with a semiclassical quantisation scheme and it is shown that within the energy width of the subbands, closed orbits, and in the superlattice minigap open orbits, are formed. Experimentally this behaviour is observed as sharp peaks in the interband Landau level absorption for energies within the subband width (closed orbits) and the disappearance of these peaks at higher energies (where no closed orbits exist).

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