Coupled energy patterns in zigzag molecular chains

Journal article

Authors / Editors

Tabi, Condrad

Research Areas

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Publication Details

Author list: Sadjo B, Tabi CB, Edongue H, Mohamadou A

Publisher: Elsevier

Place: AMSTERDAM

Publication year: 2017

Journal: Wave Motion (0165-2125)

Journal acronym: WAVE MOTION

Volume number: 72

Start page: 342

End page: 353

Number of pages: 12

ISSN: 0165-2125

eISSN: 1878-433X

Languages: English-Great Britain (EN-GB)

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Abstract

The contribution of both longitudinal and transversal nonlinear oscillations to energy localization is investigated in a zigzag molecular chain, which include simultaneously nearest and next-nearest neighbor interactions. Coupled amplitude equations are found in the form of discrete nonlinear Schrodinger equations, whose plane wave solutions are found to be subjected to some instabilities. They are shown to be very sensitive to transverse and longitudinal couplings, which is confirmed via direct numerical simulations. The two available modes are found to be alternatively responsible for energy localization and transport. Thermal fluctuations effects bring about highly localized modes, along with narrow structures for efficient energy transport. (C) 2017 Elsevier B.V. All rights reserved.

Keywords

Energy patterns, Modulational instability, Zigzag chain

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