López-Güell, Kim and Forrer, Nicolas and Cartoixà, Xavier and Zardo, Ilaria and Rurali, Riccardo. (2022) Phonon Transport in GaAs and InAs Twinning Superlattices. Journal of Physical Chemistry C, 126 (39). pp. 16851-16858.
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Official URL: https://edoc.unibas.ch/90034/
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Abstract
Crystal phase engineering gives access to new types of periodic nanostructures, such as the so-called twinning superlattices, where the motif of the superlattice is determined by a periodic rotation of the crystal. Here, by means of atomistic nonequilibrium molecular dynamics calculations, we study to what extent these periodic systems can be used to alter phonon transport in a controlled way, similar to what has been predicted and observed in conventional superlattices based on heterointerfaces. We focus on twinning superlattices in GaAs and InAs and highlight the existence of two different transport regimes: in one, each interface behaves like an independent scatterer; in the other, a segment with a sufficiently large number of closely spaced interfaces is seen by propagating phonons as a metamaterial with its own thermal properties. In this second scenario, we distinguish the case where the phonon mean free path is smaller or larger than the superlattice segment, pointing out a different dependence of the thermal resistance with the number of interfaces.
Faculties and Departments: | 05 Faculty of Science > Departement Physik > Physik > Experimental Material Physics (Zardo) |
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UniBasel Contributors: | Zardo, Ilaria and Forrer, Nicolas |
Item Type: | Article, refereed |
Article Subtype: | Research Article |
Publisher: | American Chemical Society |
ISSN: | 1932-7447 |
e-ISSN: | 1932-7455 |
Note: | Publication type according to Uni Basel Research Database: Journal article |
Language: | English |
Identification Number: |
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edoc DOI: | |
Last Modified: | 19 Oct 2022 08:24 |
Deposited On: | 19 Oct 2022 08:24 |
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