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The energy loss of a fast charged particle in a type-II superlattice

Authors
Journal
Solid State Communications
0038-1098
Publisher
Elsevier
Publication Date
Volume
65
Issue
5
Identifiers
DOI: 10.1016/0038-1098(88)90724-7

Abstract

Abstract In this Communication, a general expression is derived for the rate of loss of energy of a fast charged particle moving at constant speed parallel to alternating quasi-two-dimensional layers of electrons and holes of a type-II superlattice. By treating the motion of the charged particle classically, the force on the moving charge is obtained provided the two-dimensional electron gas layers are described by a dielectric response function. Within the classical framework where only electrostatic interactions are considered the induced dynamic polarization density in the two-dimensional plasma layers is calculated in the random-phase approximation. Thus a complete description of the rate of loss of energy is obtained by coupling the charge to the excitation modes of the model system.

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