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Acoustic interference in random superlattices

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Title: Acoustic interference in random superlattices
Authors: Tamura, Shin-ichiro1 Browse this author →KAKEN DB
Nori, Franco Browse this author
Authors(alt): 田村, 信一朗1
Issue Date: 15-Apr-1990
Publisher: American Physical Society
Journal Title: Physical Review B
Volume: 41
Issue: 11
Start Page: 7941
End Page: 7944
Publisher DOI: 10.1103/PhysRevB.41.7941
Abstract: We study theoretically the interference effects and the resulting transmission of acoustic phonons in random superlattices, i.e., multilayered systems in which two kinds of building blocks A and B are stacked at random. We derive (i) the recursion relations satisfied by the superlattice structure factors, and (ii) an analytic expression for the ensemble-averaged intensity of phonons reflected from layer interfaces of an infinite system. We predict a number of sharp features in the intensity versus frequency, which appear rather regularly. Furthermore, numerical calculations for both the double- and single-layer random superlattices indeed exhibit distinctive dip structures in phonon transmission spectra which are in good agreement with the analytical results. We also find that the single-layer random superlattices show an effective phonon-filtering action as the system size is increased, i.e., they prevent the transmission of phonons except for those satisfying resonance conditions.
Rights: Copyright © 1990 American Physical Society
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 田村 信一朗

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