Effect of the electric field mode on the dynamic process of a polaron
Effect of the electric field mode on the dynamic process of a polaron
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电场模式对极化子动态过程的影响
DOI：
10.1103/physrevb.74.172301
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发表时间：
2006-11
影响因子：
3.7
通讯作者：
Yuan Li
中科院分区：
文献类型：
--
作者：
Xiaojing Liu;Desheng Liu;Shijie Xie;Kun Gao;Jiyong Fu;Jianhua Wei;Yuan Li
用非绝热演化方法研究了共轭聚合物中带电极化子在线性递增电场作用下的输运过程。发现极化子的行为不仅与场的强度有关，而且与场的施加方式有关。极化子即使在强场下也能守恒，如果电场施加缓慢的话。结果与绝热近似的结果进行了比较，发现非绝热临界时间远大于绝热值。进一步描述了外加电场的施加方式对极化子解离的依赖性以及极化子解离速度从亚音速到超音速的跃迁。
Transport process of a charged polaron under a linearly increasing electric field in conjugated polymers is investigated by using a nonadiabatic evolution method. It is found that the behavior of a polaron depends not only upon the strength of the field but also upon the mode of the application of the field. A polaron can conserve even under a strong field if the field is applied slowly. The result is compared with that of the adiabatic approximation and it is obtained that the nonadiabatic critical time is much larger than the adiabatic value. Dependence of the applying mode of the external electric field on the polaron dissociation and the transition of its velocity from the subsonic to supersonic value are further described.