Charge transfer statistics of a molecular quantum dot with strong electron-phonon interaction

被引：60

作者：

Maier, S. ^{[1
]}

Schmidt, T. L. ^{[2
]}

Komnik, A. ^{[1
]}

机构：

[1] Univ Heidelberg, Inst Theoret Phys, D-69120 Heidelberg, Germany

[2] Yale Univ, Dept Phys, New Haven, CT 06520 USA

来源：

PHYSICAL REVIEW B | 2011年 / 83卷 / 08期

关键词：

TRANSISTORS; CONDUCTANCE; BLOCKADE; STATES; MODEL;

D O I：

10.1103/PhysRevB.83.085401

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We analyze the nonequilibrium transport properties of a quantum dot with a harmonic degree of freedom (Holstein phonon) coupled to metallic leads, and derive its full counting statistics. By using the Lang-Firsov (polaron) transformation, we construct a diagrammatic scheme to calculate the cumulant generating function. The electron-phonon interaction is taken into account exactly, and the employed approximation represents a summation of a diagram subset with respect to the tunneling amplitude. By comparison to Monte Carlo data, the formalism is shown to capture the basic properties of the strong-coupling regime.

引用

页数：6

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