Sliding of soliton lattice and atomic vibration in trans-polyacetylene

被引:1
|
作者
Mori, Y [1 ]
机构
[1] NTT Photon Labs, Atsugi, Kanagawa 2430198, Japan
来源
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS | 2006年 / 45卷 / 1B期
关键词
polyacetylene; soliton; soliton lattice; vibration; phonon; conductivity; molecular orbital;
D O I
10.1143/JJAP.45.497
中图分类号
O59 [应用物理学];
学科分类号
摘要
The sliding of charged solitons in heavily doped trans-polyacetylene is investigated by undertaking a molecular dynamics simulation with a charged model molecule. The saturated soliton sliding speed is determined so that the period of the passing solitons achieves a constant value, i.e., 15 fs. A mechanism is proposed where coupling occurs between the passing solitons and the C-C stretching vibration. This coupling determines the saturated sliding speed. As the accumulated energy of the C-C stretching vibration is effectively used for the soliton lattice translation, the speed becomes stable. and coherent sliding occurs. A comparison of (CH), with (CD), shows that the C-D bending mode mixes easily with the C-C stretching mode in the sliding process. The soliton sliding speed of (CD)(x), is not as stable as that of (CH)(x). This implies that (CD)(x) cannot have a conductivity as high as that of (CH)(x).
引用
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页码:497 / 501
页数:5
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