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arXiv 0903.2268cond-mat.mes-hall
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分子结中声子辅助的电流噪声

Phonon-assisted current noise in molecular junctions

Federica Haupt, Tomas Novotny, Wolfgang Belzig

摘要:

我们使用扩展到包括计数场的非平衡格林函数形式主义,研究了声子散射对纳米结中电流噪声的影响。在弱的电子-声子耦合和一个单一的广泛的电子水平的情况下,我们推导出在任意温度下的电流噪声的解析表达式,并确定物理上不同的贡献基于它们的电压依赖性。我们将我们的理论应用到实验相关的情况下,氘分子放置在一个断开结,并预测一个显着的非弹性贡献的电流噪声。

英文摘要:

We investigate the effects of phonon scattering on the electronic current noise through nanojunctions using the non-equilibrium Green's functions formalism extended to include the counting field. In the case of weak electron-phonon coupling and a single broad electronic level we derive an analytic expression for the current noise at arbitrary temperature and identify physically distinct contributions based on their voltage dependence. We apply our theory to the experimentally relevant case of a deuterium molecule placed in a break-junction and predict a significant inelastic contribution to the current noise.

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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