Polaron tunneling in copolymers under external electric fields

被引：2
|
作者：
Liu, DS
Wang, LX
Xie, SJ [1 ]
Han, SH
Mei, LM
机构：
[1] Shandong Univ, Sch Phys & Microelect, Dept Phys, Shandong 250100, Peoples R China
[2] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
[3] Jining Normal Univ, Dept Phys, Jining 272025, Peoples R China
来源：
OPTICAL MATERIALS | 2003年 / 23卷 / 1-2期
关键词：
copolymer; polaron; tunneling;
D O I：
10.1016/S0925-3467(02)00343-9
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Polaron tunneling is studied in xPA/nPPP/xPA (polyacetylene (PA), poly(p-phenylene) (PPP)) triblock copolymer, which has a well-barrier-well structure. The chain is modeled by a modified tight-binding Hamiltonian with an external electric field. It is found that there exists a threshold value of the external field for the polaron to tunnel through the middle barrier. The critical tunneling electric field mainly depends upon the length of the PPP segment. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：479 / 483
页数：5
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