Long transient dynamics in the Anderson-Holstein model out of equilibrium

被引：37

作者：

Albrecht, K. F. ^{[1
,2
]}

Martin-Rodero, A. ^{[3
,4
,5
]}

Monreal, R. C. ^{[3
,4
,5
]}

Muehlbacher, L. ^{[1
]}

Levy Yeyati, A. ^{[3
,4
,5
]}

机构：

[1] Univ Freiburg, Inst Phys, D-79104 Freiburg, Germany

[2] Univ Freiburg, Freiburg Inst Adv Studies, D-79104 Freiburg, Germany

[3] Univ Autonoma Madrid, Dept Fis Teor Mat Condensada, E-28049 Madrid, Spain

[4] Univ Autonoma Madrid, Ctr Invest Fis Mat Condensada, E-28049 Madrid, Spain

[5] Univ Autonoma Madrid, Inst Nicolas Cabrera, E-28049 Madrid, Spain

来源：

PHYSICAL REVIEW B | 2013年 / 87卷 / 08期

关键词：

NEGATIVE DIFFERENTIAL RESISTANCE; SINGLE-MOLECULE; CONDUCTANCE; JUNCTIONS; POLARON;

D O I：

10.1103/PhysRevB.87.085127

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We calculate the time-dependent nonequilibrium current through a single-level quantum dot strongly coupled to a vibrational mode. The nonequilibrium real-time dynamics caused by an instantaneous coupling of the leads to the quantum dot is discussed using an approximate method. The approach, which is specially designed for the strong polaronic regime, is based on the so-called polaron tunneling approximation. Considering different initial dot occupations, we show that a common steady state is reached after times much larger than the typical electron tunneling times due to a polaron blocking effect in the dot charge. A direct comparison is made with numerically exact data, showing good agreement for the time scales accessible by the diagrammatic Monte Carlo simulation method. DOI: 10.1103/PhysRevB.87.085127

引用

页数：9

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