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Intrinsic energy localization through discrete gap breathers in one-dimensional diatomic granular crystals

Theocharis, G. and Boechler, N. and Kevrekidis, P. G. and Job, S. and Porter, Mason A. and Daraio, C. (2010) Intrinsic energy localization through discrete gap breathers in one-dimensional diatomic granular crystals. Physical Review E, 82 (5). Art. No. 056604. ISSN 1539-3755.

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We present a systematic study of the existence and stability of discrete breathers that are spatially localized in the bulk of a one-dimensional chain of compressed elastic beads that interact via Hertzian contact. The chain is diatomic, consisting of a periodic arrangement of heavy and light spherical particles. We examine two families of discrete gap breathers: (1) an unstable discrete gap breather that is centered on a heavy particle and characterized by a symmetric spatial energy profile and (2) a potentially stable discrete gap breather that is centered on a light particle and is characterized by an asymmetric spatial energy profile. We investigate their existence, structure, and stability throughout the band gap of the linear spectrum and classify them into four regimes: a regime near the lower optical band edge of the linear spectrum, a moderately discrete regime, a strongly discrete regime that lies deep within the band gap of the linearized version of the system, and a regime near the upper acoustic band edge. We contrast discrete breathers in anharmonic Fermi-Pasta-Ulam (FPU)-type diatomic chains with those in diatomic granular crystals, which have a tensionless interaction potential between adjacent particles, and note that the asymmetric nature of the tensionless interaction potential can lead to hybrid bulk-surface localized solutions.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Kevrekidis, P. G.0000-0002-7714-3689
Daraio, C.0000-0001-5296-4440
Additional Information:© 2010 American Physical Society. Received 27 August 2010; published 8 November 2010. We thank Michael Weinstein and Vassilis Koukouloyannis for useful discussions. This work has been supported from “A.S. Onasis” Foundation, Grant No. RZG 003/2010-2011 (G.T. and P.G.K.). P.G.K. gratefully acknowledges support from the National Science Foundation Grants No. NSF-DMS-0349023 (CAREER), No. NSF-DMS-0806762, and No. NSF-CMMI-1000337 as well as from the Alexander von Humboldt Foundation. C.D. acknowledges support from the Army Research Office MURI (Dr. David Stepp) and from the National Science Foundation Grant No. NSF-CMMI-0844540 (CAREER).
Funding AgencyGrant Number
Alexander S. Onassis Public Benefit FoundationRZG 003/2010-2011
Alexander von Humboldt FoundationUNSPECIFIED
Army Research Office (ARO)UNSPECIFIED
Issue or Number:5
Classification Code:PACS: 46.40.-f, 63.20.Ry, 63.20.Pw, 45.70.-n
Record Number:CaltechAUTHORS:20101206-145418167
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21197
Deposited By: Benjamin Perez
Deposited On:07 Dec 2010 16:55
Last Modified:09 Mar 2020 13:18

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