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Ballistic phonon transport through a Fibonacci array of acoustic nanocavities in a narrow constriction |
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| Authors: | Yuan MoWei-Qing Huang Gui-Fang Huang Wangyu Hu Ling-Ling Wang Anlian Pan |
| Affiliation: | a Department of Applied Physics, Hunan University, Changsha 410082, China b Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, Hunan University, Changsha 410082, China c CCAST (World Laboratory), P.O. Box 8730, Beijing 100080, China |
| Abstract: | We investigate the ballistic phonon transport through a Fibonacci array of acoustic nanocavities in a narrow constriction of a semiconductor nanowire at low temperatures. It is found that the transmission spectrum of such a system consists of quasiband gaps and narrow resonances caused by the coupling of phonon waves. Both phonon transmission and thermal conductance exhibit the similarity due to the Fibonacci sequence structure. The similarity is sensitive to the number n and parameters of nanocavities. The results are compared with those in a periodic acoustic nanocavities. |
| Keywords: | Phonons Cavities Ballistic transport Heat conduction |
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