✦ LIBER ✦

Variation in frequencies of confined longitudinal-optical phonon modes due to changes in the effective force constants near heterojunction interfaces

✍ Scribed by M.A. Stroscio; K.W. Kim; J.C. Hall

Publisher: Elsevier Science
Year: 1990
Tongue: English
Weight: 289 KB
Volume: 7
Category: Article
ISSN: 0749-6036
DOI: 10.1016/0749-6036(90)90123-o

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✦ Synopsis

A linear-chain model with variable force constants for the couplings at heterojunctiorts is used to calculate the spectrum of confined longitudinal-optical (LO) phonon frequencies in a short-period strained-layer superlattice. Even for the case of a superlattice with only two atomic monolayers in each supedattice layer, it is demonstrated that the frequencies of confined LO-phonon modes are only weakly dependent on variations in interracial force constants.