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物理学报. 2003, 52(12): 3191-3196.
doi: 10.7498/aps.52.3191.
扰动对一维局域模的影响
- 收稿日期: 2002-12-10
- 修回日期: 2003-02-28
- 刊出日期: 2003-06-05
English Abstract
Effect of atomic fluctuation on the localized modes in one-dimensional system
- Received Date:
10 December 2002
- Accepted Date:
28 February 2003
- Published Online:
05 June 2003
Abstract: In the frame work of the tight-binding approximation, the effect of defects and disorder on the vibrational modes in one-dimensional systems was studied through a random distribution model. It was found that the Goldstone mode of a so liton or polaron is pinned and its frequency is shifted up to a finite value. Th e weak mode g4 of a soliton is enhanced. The staggered modes keep the ir localization even if there is a large lattice fluctuation. Some new modes appear when the perfect soliton or polaron configuration is disturbed.
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Keywords:
- atomic fluctuation /
- localized mode /
- polymer
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