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Correlations in phonon-transmission spectra in periodic and quasiperiodic superlattices

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Title: Correlations in phonon-transmission spectra in periodic and quasiperiodic superlattices
Authors: Tamura, S.1 Browse this author →KAKEN DB
Watanabe, T. Browse this author
Authors(alt): 田村, 信一朗1
Issue Date: 15-Mar-1989
Publisher: American Physical Society
Journal Title: Physical Review B
Volume: 39
Issue: 8
Start Page: 5349
End Page: 5352
Publisher DOI: 10.1103/PhysRevB.39.5349
Abstract: We study the origin of correlations in phonon-transmission spectra in Fibonacci and periodic superlattices (SL’s), which have recently been recognized by numerical calculations and then confirmed by phonon-imaging experiments. The structure factors describing the interference effects of phonons reflected from the interfaces of both periodic and Fibonacci SL’s are calculated. It is found that the wave number Qm,n (indexed by two integers m and n) for which the largest reflection occurs in a Fibonacci SL is identical to the wave number Qm+n for which (m+n)th Bragg reflection of phonons occurs in the corresponding periodic SL. We also show more generally that major phonon-transmission dips in the Fibonacci SL occur at frequencies close to each transmission dip in the periodic SL. Two-dimensional maps for the Bragg and Bragg-like reflections of phonons in these systems indicate that the correlations are applicable, irrespective of propagation directions and modes participating in the reflection processes.
Rights: Copyright © 1989 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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