Raman probing of the magnetoresistance in doped GaAs/AlAs superlattices
Yu A Pusep; Jun-Jih Liang; J Geurts; N N Moshegov
Журнал:
Journal of Physics: Condensed Matter
Дата:
2000-12-18
Аннотация:
The reaction of collective plasmon-longitudinal optical phonon excitations to a magnetic field in heavily doped GaAs/AlAs superlattices was studied. The influence of the magnetic field on both the spatial extent (the localization length) of the collective excitations and their damping constant was explored. The dependence of the damping constant, associated with the alternating-current conductivity, on the magnetic field was found to be in good agreement with the classical Drude theory. It was shown that the magnetic field influences the damping of the plasmon-like excitations much more strongly than their spatial extent.
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