Author
Listed:
- Eunho Kim
(University of Washington
Chonbuk National University)
- Alejandro J. Martínez
(University of Oxford)
- Sean E. Phenisee
(University of Washington)
- P. G. Kevrekidis
(University of Massachusetts)
- Mason A. Porter
(University of Oxford
University of California
University of Oxford)
- Jinkyu Yang
(University of Washington)
Abstract
Energy transport properties in heterogeneous materials have attracted scientific interest for more than half of a century, and they continue to offer fundamental and rich questions. One of the outstanding challenges is to extend Anderson theory for uncorrelated and fully disordered lattices in condensed-matter systems to physical settings in which additional effects compete with disorder. Here we present the first systematic experimental study of energy transport and localization properties in simultaneously disordered and nonlinear granular crystals. In line with prior theoretical studies, we observe in our experiments that disorder and nonlinearity—which individually favor energy localization—can effectively cancel each other out, resulting in the destruction of wave localization. We also show that the combined effect of disorder and nonlinearity can enable manipulation of energy transport speed in granular crystals. Specifically, we experimentally demonstrate superdiffusive transport. Furthermore, our numerical computations suggest that subdiffusive transport should be attainable by controlling the strength of the system’s external precompression force.
Suggested Citation
Eunho Kim & Alejandro J. Martínez & Sean E. Phenisee & P. G. Kevrekidis & Mason A. Porter & Jinkyu Yang, 2018.
"Direct measurement of superdiffusive energy transport in disordered granular chains,"
Nature Communications, Nature, vol. 9(1), pages 1-6, December.
Handle:
RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-03015-3
DOI: 10.1038/s41467-018-03015-3
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