Basko D M, Conwell E M
Department of Chemistry, University of Rochester, Rochester, New York 14627, USA.
Phys Rev Lett. 2002 Feb 4;88(5):056401. doi: 10.1103/PhysRevLett.88.056401. Epub 2002 Jan 15.
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.
我们研究了在高电场存在下，极化子在导电聚合物中的稳态运动。使用Su-Schrieffer-Heeger模型加上一个电场，我们发现，在极化子速度不超过声速的情况下，电子能量向晶格的耗散是通过发射具有单一选定波矢的声子发生的。对于这种情况，对极化子迁移率的相应贡献可以通过解析计算得出。我们讨论了在超声速下的非常高的场中，极化子相对于解离的稳定性问题。
