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Multi-site Compact-Like Discrete Breather in Discrete One-Dimensional Monatomic Chains |
| XU Quan1,2;TIAN Qiang2 |
| 1Scientific and Technological Office, Daqing Normal University, Daqing 1637122Department of Physics, Beijing Normal University, Beijing 100875 |
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| Cite this article: |
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XU Quan, TIAN Qiang 2007 Chin. Phys. Lett. 24 3351-3355 |
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Abstract Multi-site compact-like discrete breathers in discrete one-dimensional monatomic chains are investigated by discussing a generalized discrete one-dimensional monatomic model. We obtain that the two-site compact-like discrete breathers with codes σ ={ 0,... ,0,1,1,0,... ,0} and codes σ={0,... , 0,1,-1,0,... ,0} can exist in discrete one-dimensional monatomic chain with quartic on-site and inter-site potentials. However, the former can only exist in hard quartic on-site potential and cannot exist in soft quartic on-site potential, whereas the latter is just reversed. All of the two-site Compact-like discrete breathers with codes σ.={0,....,0,1,1,0,.... ,0} and σ ={0,... , 0,1,-1,0, .... ,0} cannot exist in a pure K4 chain.
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| Keywords:
05.45.Xt
02.30.Jr
63.20.Pw
63.20.Ry
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Received: 03 October 2007
Published: 03 December 2007
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