Memory effect in a molecular quantum dot with strong electron-vibron interaction

Article

关键词: TRANSPORT;    CONDUCTANCE;   

DOI  :  10.1103/PhysRevB.67.235312

来源: SCIE

【 摘 要 】

Polaron theory of tunneling through a molecular quantum dot (MQD) with strong electron-vibron interactions and attractive electron-electron correlations is developed. The dot is modeled as a d-fold-degenerate energy level weakly coupled to the leads. The effective attractive interaction between polarons in the dot results in a switching phenomenon in the current-voltage characteristics when d>2, in agreement with the results for the phenomenological negative-U model. The degenerate MQD with strong electron-vibron coupling has two stable current states in a certain interval of the bias voltage below some critical temperature.

【 授权许可】

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