Current noise in single-molecule junctions induced by electronic-vibrational coupling

被引：36

作者：

Schinabeck, C. ^{[1
]}

Haertle, R. ^{[1
]}

Weber, H. B. ^{[2
]}

Thoss, M. ^{[1
]}

机构：

[1] Univ Erlangen Nurnberg, Inst Theoret Phys & Interdisziplinares Zentrum Mo, D-91058 Erlangen, Germany

[2] Univ Erlangen Nurnberg, Lehrstuhl Angew Phys, D-91058 Erlangen, Germany

来源：

PHYSICAL REVIEW B | 2014年 / 90卷 / 07期

关键词：

SHOT-NOISE; COUNTING STATISTICS; QUANTUM SHUTTLE; SUPPRESSION; TRANSPORT; CONDUCTANCE; CHARGE; TRANSISTOR; CONTACTS; SCATTERING;

D O I：

10.1103/PhysRevB.90.075409

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of multiple vibrational modes on current fluctuations in electron transport through single-molecule junctions is investigated. Our analysis is based on a generic model of a molecular junction, which comprises a single electronic state on the molecular bridge coupled to multiple vibrational modes and fermionic leads, and employs a master equation approach. The results reveal that in molecular junctions with multiple vibrational modes, already weak to moderate electronic-vibrational coupling may result in high noise levels, especially at the onset of resonant transport, in accordance with the experimental findings of Secker et al. [Phys. Rev. Lett. 106, 136807 (2011)]. The underlying mechanisms are analyzed in some detail.

引用

页数：16

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