Enhanced mobility of high-frequency discrete breathers in a monatomic chain with odd anharmonicity |
| |
Authors: | A Shelkan M Klopov V Hizhnyakov |
| |
Institution: | 1. Institute of Physics, University of Tartu, Ravila 14c, 50411 Tartu, Estonia;2. Department of Physics, Tallinn University of Technology, Ehitajate 5, 19086 Tallinn, Estonia |
| |
Abstract: | The mobility of high-frequency discrete breathers in monatomic chains with nonlinear interatomic potentials of the nearest neighbors is considered. It was found that the odd (cubic and fifth) anharmonicity strongly affects the mobility of breathers, sharply increasing the distance that it propagates without being trapped. It was also found that the correctly chosen fifth anharmonicity leads to an inversion of stability between the bond-centered and site-centered breathers and to the low-radiative propagation of discrete breathers along the chain. |
| |
Keywords: | Lattice vibrations Moving discrete breathers Odd anharmonicity |
本文献已被 ScienceDirect 等数据库收录! |
|