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arXiv 1304.0963cond-mat.mes-hall
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分子结中的光发射和有限频率散粒噪声:从隧穿到接触

Light emission and finite frequency shot noise in molecular junctions: from tunneling to contact

Jing-Tao Lü, Rasmus Bjerregaard Christensen, Mads Brandbyge

摘要:

在最近的实验中,从原子或分子结的隧穿到接触机制探索了扫描隧道显微镜诱导的光发射。在那里,光发射的强度显示出与光频率下的电流/电荷波动的强相关性。我们表明,这是一致的隧道制度与既定的理论,通过写有限频率的散粒噪声作为不同的电子状态之间的非弹性跃迁的总和。在此基础上,我们开发了一个实用的方案,使用格林函数对现实结构进行计算。获得的光子发射产额再现了实验的基本特征。

英文摘要:

Scanning tunneling microscope induced light emission from an atomic or molecular junction has been probed from the tunneling to contact regime in recent experiments. There, the intensity of the light emission shows strong correlation with the current/charge fluctuations at optical frequencies. We show that this is consistent with the established theory in the tunneling regime, by writing the finite-frequency shot noise as a sum of inelastic transitions between different electronic states. Based on this, we develop a practical scheme to perform calculations on realistic structures using Green's functions. The photon emission yields obtained re-produce the essential feature of the experiments.

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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