| Autor: |
Yangyu Guo, Marc Bescond, Zhongwei Zhang, Shiyun Xiong, Kazuhiko Hirakawa, Masahiro Nomura, Sebastian Volz |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
APL Materials, Vol 9, Iss 9, Pp 091104-091104-12 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
2166-532X |
| DOI: |
10.1063/5.0054921 |
| Popis: |
Anderson localization of thermal phonons has been shown only in few nanostructures with strong random disorder by the exponential decay of transmission to zero and a thermal conductivity maximum when increasing the system length. In this work, we present a path to demonstrate the phonon localization with distinctive features in graded superlattices with short-range order and long-range disorder. A thermal conductivity minimum with system length appears due to the exponential decay of transmission to a non-zero constant, which is a feature of partial phonon localization caused by the moderate disorder. We provide clear evidence of localization through the combined analysis of the participation ratio, transmission, and real-space phonon number density distribution based on our quantum transport simulation. The present work would promote heat conduction engineering by localization via the wave nature of phonons. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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