Stationary polaron motion in a polymer chain at high electric fields.
Stationary polaron motion in a polymer chain at high electric fields.
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DOI：
10.1103/physrevlett.88.056401
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发表时间：
2002-01
影响因子：
8.6
通讯作者：
D. Basko;E. Conwell
中科院分区：
文献类型：
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作者：
D. Basko;E. Conwell
我们研究强电场下导电聚合物中极化子的静止运动。使用 Su-Schrieffer-Heeger 模型加上电场，我们发现在极化子速度不超过声速时，电子能量通过发射具有单个选定波矢量的声子而耗散到晶格中。对于这种情况，可以通过分析计算对极化子迁移率的相应贡献。我们讨论了超音速极高场中离解的极化子稳定性问题。
We study the stationary motion of a polaron in a conducting polymer in the presence of a high electric field. Using the Su-Schrieffer-Heeger model plus an electric field, we find that at polaron velocities not exceeding the sound velocity, the dissipation of the electronic energy into the lattice occurs via emission of phonons with single selected wave vector. For this case the corresponding contribution to the polaron mobility can be calculated analytically. We discuss the issue of the polaron stability with respect to dissociation in a very high field at supersonic velocities.