极化子在分子中跳跃的电荷关联
Charge correlations in polaron hopping through molecules
摘要：
在许多有机分子中，过量电荷与振动模式的强耦合导致极化子的形成，即，载流子的定域状态和分子变形。极化子沿分子的非相干跳跃是室温下输运的主要机制。我们研究远离平衡的情况下，由于施加的偏压，诱导的载流子的分子上的数量是足够高的，使电荷相关性成为相关的。我们开发了一个图解理论，精确地占所有的多粒子相关函数通过有限系统的非相干传输。我们计算的DNA短序列的输运性质的图形理论扩展到二阶的跳跃参数。与仅在平均场型近似中处理相关性的那些方法相比，相关性定性地修改I-V特性。
英文摘要：
In many organic molecules the strong coupling of excess charges to vibrational modes leads to the formation of polarons, i.e., a localized state of a charge carrier and a molecular deformation. Incoherent hopping of polarons along the molecule is the dominant mechanism of transport at room temperature. We study the far-from-equilibrium situation where, due to the applied bias, the induced number of charge carriers on the molecule is high enough such that charge correlations become relevant. We develop a diagrammatic theory that exactly accounts for all many-particle correlations functions for incoherent transport through a finite system. We compute the transport properties of short sequences of DNA by expanding the diagrammatic theory up to second order in the hopping parameters. The correlations qualitatively modify the I-V characteristics as compared to those approaches where correlations are dealt with in a mean-field type approximation only.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
