摘要
基于紧束缚的Su-Schrieffer-Heeger模型,利用非绝热的动力学方法,研究了金属/聚合物/金属三明治结构中载流子注入与输运的动力学过程,其中,聚合物中含有一个掺杂离子.电子波函数随时间的演化满足含时Schrdinger方程,晶格运动满足经典的牛顿运动方程.研究发现,掺杂离子对注入到聚合物中的载流子的作用类似一个控制阀门,阀门的状态与电场的强度和偏压的大小密切相关.
Using the tight-binding Su-Schrieffer-Heeger （SSH） model and a nonadiabatic dynamical evolution method, the dynamic process of the charge carrier injection and transport through metal/ polymer/metal structure was studied, for which the polymer chain contains an impurity ion. The electron wave function was described by the time-dependent Schrodinger equation, while the polymer lattice was treated classically by the Newtonian equations of motion. It was found that the impurity ion acts as a control gate on the charge carriers, while the state of the control gate is determined by the strength of the electric field and the magnitude of the bias voltage.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2008年第2期1117-1122,共6页
Acta Physica Sinica
基金
国家自然科学基金(批准号:10574082,10474056)
山东省自然科学基金(批准号:Z2005A01)资助的课题.~~
关键词
载流子输运
波包
非绝热动力学
the charge carriers transport, wave packet, nonadiabatic dynamics
