ISSN 0869-6632 (Print)
ISSN 2542-1905 (Online)

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Hadeeva L. Z., Dmitriev S. V. Characteristics of gap discrete breathers in crystals with NaCl structure. Izvestiya VUZ. Applied Nonlinear Dynamics, 2010, vol. 18, iss. 6, pp. 85-92. DOI: 10.18500/0869-6632-2010-18-6-85-92

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Characteristics of gap discrete breathers in crystals with NaCl structure

Hadeeva Lija Zavirovna, Institute of Problems of Metal Superplasticity RAS
Dmitriev Sergej Vladimirovich, Institute of Problems of Metal Superplasticity RAS

Molecular dynamics method is used to study the effect of mass ratio of anions and cations on the phonon spectra of the crystal with NaCl structure and on the discrete breathers existence  conditions and properties of gap discrete breathers. We show that discrete breathers can be easily excited for the mass ratio less than 0.2, when the gap in the phonon spectrum is wide enough to support them. When the mass ratio is equal to 0.1 we could find at least three types of stable discrete breathers, differed by the number of large amplitude atoms and by polarization of oscillation.

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