ELEMENTARY RELAXATION PROCESSES OF ONE-DIMENSIONAL EXCITONS COUPLED WITH LATTICE-VIBRATIONS - A MOLECULAR-DYNAMICS STUDY

被引：7

作者：

ISHIDA, K

机构：

[1] Advanced Research Laboratory, Toshiba R {A figure is presented} D Center, Saiwai-ku, Kawasaki, 210

来源：

SOLID STATE COMMUNICATIONS | 1994年 / 90卷 / 02期

关键词：

Hole - Lattice deformation - Lattice relaxation - Molecular dynamics - Polydiacetylenes - Ultrafast spectroscopy;

D O I：

10.1016/0038-1098(94)90937-7

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Transient lattice relaxation in the self-trapping processes of excitons has been studied by molecular dynamics, employing a one-dimensional two-band model coupled with lattice vibrations. We have found that the initial relaxation of an exciton is composed of three processes. Due to the first process in which an exciton remains free preceding the lattice relaxation, the relaxation time for the transition from a free exciton to a self-trapped exciton has been found to be several times larger than the period of the lattice vibrations, which agreed with the experimental results of ultrafast spectroscopy on polydiacetylenes.

引用

页码：89 / 92

页数：4

共 5 条

[1] ONE-DIMENSIONAL EXCITON IN A 2-BAND TIGHT-BINDING MODEL WITH LONG-RANGE INTERACTIONS [J].