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arXiv 0906.0935cond-mat.mes-hallcond-mat.str-el
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可变形分子器件的温度电导

Temperature dependent conductances of deformable molecular devices

Balázs Dóra, András Halbritter

摘要:

研究了耦合到振动模的分子器件的输运。通过将其映射到大接触加宽极限下的Yu-Anderson模型,非微扰地计算了零偏压电导和热导。这些表现出一个步骤,从他们的T=0的值,其值的一半,因为T的增加,由于非弹性散射通道的开放。谱函数表现出Franck-Condon抑制的多声子阶跃。Wiedemann-Franz定律在低温和高温下都是成立的,但在两者之间就不成立了。与实验的关系进行了讨论。

英文摘要:

Transport through a molecular device coupled to a vibrational mode is studied. By mapping it to the Yu-Anderson model in the large contact broadening limit, the zero bias electric and heat conductances are evaluated non-perturbatively. These exhibit a step from their T=0 value to half of its value as T increases due to the opening of the inelastic scattering channel. The spectral function exhibits the Franck-Condon suppressed multiphonon steps. The Wiedemann-Franz law is satisfied at low and high temperatures, but is violated in between. Relations to experiments are discussed.

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。

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