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Acoustic interference in random superlattices
| 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 |
| Relation: | http://www.aps.org/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/5944 |
| 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)
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Submitter: 田村 信一朗
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