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Title: Magnetoplasmons and their line shapes in a doped superlattice and a compositional superlattice of type-II
Authors: Sharma, A C
Tripathi, P
Sen, R
Jain, N
Issue Date: Jul-1999
Publisher: NISCAIR-CSIR, India
Abstract: Calculation of magnetoplasmons and their line shapes for a doped superlattice and a compositional type-II superlattice has been performed for the case when static magnetic field is applied along the direction of superlattice. Polarizability of two dimensional electron (hole) gas for all possible transitions between Landau levels have been calculated. The frequencies of magnetoplasmons and their line shapes are then computed for a GaAs doped superlattice and for InAs/GaSb compositional superlattice for 0 → 1, 0 → 2 and 0 → 3 transitions by assuming that only ground Landau level (n = 0) is filled. InAs/GaSb superlattice exhibits three bands of magnetoplasmons for each of electron as well as hole gas. In case of GaAs doped superlattice only one band of magnetoplasmons is obtained for holes, whereas three bands are obtained for electrons, because of high value of single particle scattering for a doped superlattice as compared to that for a compositional superlattice. Our computed line shapes of magnetoplasmons exhibit reasonable peak height and peak width which can be measured experimentally for right choice of values of superlattice parameters.
Page(s): 545-555
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.37(07) [July 1999]

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