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Mode-conversion effects of phonons on Anderson localization
| Title: | Mode-conversion effects of phonons on Anderson localization |
| Authors: | Yoshihiro, Tatsuya Browse this author | | Nishiguchi, Norihiko Browse this author →KAKEN DB |
| Issue Date: | 23-Dec-2019 |
| Publisher: | American Physical Society (APS) |
| Journal Title: | Physical Review B |
| Volume: | 100 |
| Issue: | 23 |
| Start Page: | 235441 |
| Publisher DOI: | 10.1103/PhysRevB.100.235441 |
| Abstract: | Numerically investigating mode-conversion effects of phonons on Anderson localization in random superlattices, we make it clear the changes in localization properties when the LA and TA phonons which independently show Anderson localization for the normal incidence interact as the incident angles increase. The mode conversions which occur for oblique propagation at small incident angles induce collaboration among the phonons, giving rise to extension of the localization length or delocalization, depending on the system size. On the other hand, at large incident angles, the transmission decay becomes larger than for the normal incidence. In contrast to the small incident angles, the transmission decay and transmission fluctuations become independent of the incident phonon modes and show the frequency dependences that are not predictable from those at the small incident angles, evidencing that the coupled modes of phonons are formed by the mode conversions. |
| Rights: | Copyright 2019 by The American Physical Society. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/76615 |
| 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: 西口 規彦
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