Effects of interface phonon scattering in multiheterointerface structures

Journal Article (Journal Article)

In this paper, the commonly used but idealistic formulation of quantized optical-phonon modes for a heterostructure system with only two heterojunctions (i.e., single quantum-well structures) is extended to the more realistic case of multiheterointerface structures. By applying the macroscopic dielectric continuum approach, dispersion relations and interaction Hamiltonians for interface-phonon modes are derived for a double-barrier structure and scattering rates based on these results are used to determine the range of practical validity of the idealistic model using interaction Hamiltonians appropriate for single quantum wells with infinite barrier widths. It is found that when the dimensions of the structures are larger than approximately 30 Å, this simplified description can be applied to multiheterointerface structures in general with reasonable accuracy.

Full Text

Duke Authors

Cited Authors

  • Kim, KW; Bhatt, AR; Stroscio, MA; Turley, PJ; Teitsworth, SW

Published Date

  • December 1, 1992

Published In

Volume / Issue

  • 72 / 6

Start / End Page

  • 2282 - 2287

International Standard Serial Number (ISSN)

  • 0021-8979

Digital Object Identifier (DOI)

  • 10.1063/1.351569

Citation Source

  • Scopus