Discrete breathers in hexagonal dusty plasma lattices

Journal Article · Sat Aug 15 04:00:00 EDT 2009 · Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print)

DOI:https://doi.org/10.1103/PHYSREVE.80.026402· OSTI ID:21347283

Koukouloyannis, V; Kourakis, I ^[1]

---

1. Department of Physics, Section of Astrophysics, Astronomy and Mechanics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece and Department of Civil Engineering, Technological Educational Institute of Serres, 62124 Serres (Greece)

The occurrence of single-site or multisite localized vibrational modes, also called discrete breathers, in two-dimensional hexagonal dusty plasma lattices is investigated. The system is described by a Klein-Gordon hexagonal lattice characterized by a negative coupling parameter epsilon in account of its inverse dispersive behavior. A theoretical analysis is performed in order to establish the possibility of existence of single as well as three-site discrete breathers in such systems. The study is complemented by a numerical investigation based on experimentally provided potential forms. This investigation shows that a dusty plasma lattice can support single-site discrete breathers, while three-site in phase breathers could exist if specific conditions, about the intergrain interaction strength, would hold. On the other hand, out of phase and vortex three-site breathers cannot be supported since they are highly unstable.

• OSTI ID: 21347283
• Journal Information: Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print), Journal Name: Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print) Journal Issue: 2 Vol. 80; ISSN 1539-3755
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFERENTIAL EQUATIONS
EQUATIONS
FIELD EQUATIONS
HEXAGONAL LATTICES
KLEIN-GORDON EQUATION
PARTIAL DIFFERENTIAL EQUATIONS
PLASMA
PLASMA DENSITY
PLASMA SHEATH
TWO-DIMENSIONAL CALCULATIONS
WALL EFFECTS
WAVE EQUATIONS