Abstract Effects of impurity on eigenmodes in one-dimensional dusty plasma lattices are studied. It is found that local modes can be excited besides lattice waves, due to the existence of an impurity particle. The dispersion relations of the modes are derived accordingly. Properties of the lattice and local modes are also analyzed and discussed, particularly for their symmetric features and conditions of the mode excitation.
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 40731056 and 10975012) and the President Fund for Undergraduate Research of Peking University, China.
Corresponding Authors:
Wang Xiao-Gang
E-mail: xgwang@pku.edu.cn
Cite this article:
Ren Yong-Chao (任永超), Wang Xin-Shang (王欣上), Wang Xiao-Gang (王晓钢 ) Impurity-induced local modes in one-dimensional dusty plasma chains 2012 Chin. Phys. B 21 115201
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