Nonequilibrium transport in molecular junctions with strong electron-phonon interactions

R. C. Monreal; F. Flores; A. Martin-Rodero

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Nonequilibrium transport in molecular junctions with strong electron-phonon interactions

机译：具有强电子-声子相互作用的分子结中的非平衡输运

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We present a combined theoretical approach to study the nonequilibrium transport properties of nanoscale systems coupled to metallic electrodes and exhibiting strong electron-phonon interactions. We use the Keldysh Green's function formalism to generalize beyond linear theory in the applied voltage an equation-of-motion method and an interpolative self-energy approximation previously developed in equilibrium. We analyze the specific characteristics of inelastic transport appearing in the intensity versus voltage curves and in the conductance, providing qualitative criteria for the sign of the steplike features in the conductance. Excellent overall agreement between both approaches is found for a wide range of parameters.

机译：我们提出了一种组合的理论方法来研究与金属电极耦合并表现出强大的电子-声子相互作用的纳米级系统的非平衡传输性质。我们使用Keldysh Green的函数形式主义在施加电压上超越了线性理论，推广了运动方程方法和先前在平衡状态下发展出的内插自能近似。我们分析了强度与电压曲线和电导中出现的非弹性传输的特定特征，为电导中阶梯状特征的符号提供了定性标准。对于各种参数，两种方法之间都具有出色的整体一致性。

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《Physical review》 |2010年第23期|p.694-703|共10页
作者
R. C. Monreal; F. Flores; A. Martin-Rodero;
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作者单位

Departamento de Fisica Teorica de la Materia Condensada C05, Universidad Autonoma de Madrid, Francisco Tomds y Valiente 7, E-28049 Madrid, Spain;

Departamento de Fisica Teorica de la Materia Condensada C05, Universidad Autonoma de Madrid, Francisco Tomds y Valiente 7, E-28049 Madrid, Spain;

Departamento de Fisica Teorica de la Materia Condensada C05, Universidad Autonoma de Madrid, Francisco Tomds y Valiente 7, E-28049 Madrid, Spain;

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polarons and electron-phonon interactions; quantum dots;

机译：极化子和电子-声子相互作用;量子点;

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7. Nonequilibrium transport in molecular junctions with strong electron-phonon interactions [O] . Monreal, R. C., Flores, F., Martin-Rodero, A. 2010

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Nonequilibrium transport in molecular junctions with strong electron-phonon interactions

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