Vibrational instabilities in resonant electron transport through single-molecule junctions

Article

关键词: PHONON-EMISSION;    CONDUCTANCE;    TRANSISTORS;    SCATTERING;    EQUATION;   

DOI  :  10.1103/PhysRevB.83.125419

来源: SCIE

【 摘 要 】

We analyze various limits of vibrationally coupled resonant electron transport in single-molecule junctions. Based on a master equation approach, we discuss analytic and numerical results for junctions under a high bias voltage or weak electronic-vibrational coupling. It is shown that in these limits, the vibrational excitation of the molecular bridge increases indefinitely, i.e., the junction exhibits a vibrational instability. Moreover, our analysis provides analytic results for the vibrational distribution function and reveals that these vibrational instabilities are related to electron-hole pair creation processes.

【 授权许可】

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