Phonon Engineering in Twinning Superlattice Nanowires
De Luca, Marta (Universität Basel. Departement Physik)
Fasolato, Claudia (Università degli Studi di Perugia. Dipartimento di Fisica e Geologia)
Verheijen, Marcel A. (Eindhoven University of Technology. Departament of Applied Physics)
Ren, Yizhen (Eindhoven University of Technology. Departament of Applied Physics)
Swinkels, Milo Y. (Universität Basel. Departement Physik)
Kölling, Sebastian (Eindhoven University of Technology. Departament of Applied Physics)
Bakkers, Erik P. A. M. (Eindhoven University of Technology. Departament of Applied Physics)
Rurali, Riccardo (Institut de Ciència de Materials de Barcelona)
Cartoixà Soler, Xavier (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
Zardo, Ilaria (Universität Basel. Departement Physik)

Data:	2019
Resum:	One of the current challenges in nanoscience is tailoring the phononic properties of a material. This has long been a rather elusive task because several phonons have wavelengths in the nanometer range. Thus, high quality nanostructuring at that length-scale, unavailable until recently, is necessary for engineering the phonon spectrum. Here we report on the continuous tuning of the phononic properties of a twinning superlattice GaP nanowire by controlling its periodicity. Our experimental results, based on Raman spectroscopy and rationalized by means of ab initio theoretical calculations, give insight into the relation between local crystal structure, overall lattice symmetry, and vibrational properties, demonstrating how material engineering at the nanoscale can be successfully employed in the rational design of the phonon spectrum of a material.
Ajuts:	European Commission 756365 Ministerio de Economía y Competitividad 90024-P Ministerio de Economía y Competitividad SEV-2015-0496 Ministerio de Economía y Competitividad TEC2015-67462-C2-1-R Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-301
Nota:	This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes. License: https://pubs.acs.org/page/policy/authorchoice_termsofuse.html
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Phonon engineering ; Twinning superlattices ; Nanowires ; Raman spectroscopy ; DFT calculations
Publicat a:	Nano letters, Vol. 19, Num. 7 (July 2019) , p. 4702-4711, ISSN 1530-6992

DOI: 10.1021/acs.nanolett.9b01775
PMID: 31203630

10 p, 3.5 MB

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