EFFECTS OF DISTANCE DEPENDENCE OF EXCITON HOPPING ON THE DAVYDOV SOLITON

被引：13

作者：

BARTNIK, EA

TUSZYNSKI, JA

SEPT, D

机构：

[1] UNIV DUSSELDORF,INST THEORET PHYS 1,D-40225 DUSSELDORF,GERMANY

[2] UNIV ALBERTA,DEPT PHYS,EDMONTON,AB T6G 2J1,CANADA

来源：

PHYSICS LETTERS A | 1995年 / 204卷 / 3-4期

关键词：

D O I：

10.1016/0375-9601(95)00481-H

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Davydov model of energy transfer in molecular chains is reconsidered assuming the distance dependence of the exciton hopping term. New equations of motion for phonons and excitons are derived within the coherent state approximation. Solving these nonlinear equations results in the existence of Davydov-like solitons. In the case of a dilatational soliton, the amplitude and width is decreased as a result of the mechanism introduced here and above a critical coupling strength our equations do not allow for Davydov-like solutions. For compressional solitons, stability is not affected.

引用

页码：263 / 268

页数：6

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