Dynamics of an Acoustic Polaron in One-Dimensional Electron-Lattice System

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概要

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• The dynamical behavior of an acoustic polaron in typical non-degenerate con.jugated polynuer,polydiacetylene, is ntrmerically studied by tusing Su-Schriefl'er-Heeger's tnodel for the one dimen-sional electron-lattice system. It is confirrned that the velocity of a polaron accelerated by aconstant electric field shows a saturation to a velocity close to the sotnnd velocity of the systern,and that the width of a rnoving polaron decreases as a monotonic function of the velocity tendingto zero at the saturation velocity. The efl'ective naass of a polaron is estirnated to be about onehundred times as heavy as the bare electron mass. Furthermore the linear mode analysis in thepresence of a polaron is carried out, leading to the conclusion that there is only one localizedmode, i.e. the translational rnode. This is confirmed also frorn the phase shift of extended rnodes.There is no localized mode corresponding to the arnplitttde mode irr the case of the soliton inpolyacetylene. Nevertheless the width of a rnovizag polaron shows small oscillations in time. Thisis found to be related to the lowest odd symnuetry extended mode and to be dtre to the finitesize elect.

• 社団法人日本物理学会の論文
• 1996-05-15

著者

• ONO Yoshiyuki

  Department of Physics,Toho University

• Ono Yoshiyuki

  Department Of Physicis Toho University

• ARIKABE Yoshitaka

  Department of Physics,Toho University

• KUWABARA Makoto

  Fundamental Physics Section,Physical Science Division,Electrotechnical Laboratory

• Arikabe Yoshitaka

  Department Of Physics Toho University

• Kuwabara Makoto

  Fundamental Physics Section Physical Science Division Electrotechnical Laboratory

• Kuwabara Makoto

  Fundamental Physics Science Physical Science Division Electrotechnical Loboratory

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