ac field-induced quantum rectification effect in tunnel junctions

被引：7

作者：

Fistul, MV ^{[1
]}

Miroshnichenko, AE

Flach, S

机构：

[1] Univ Erlangen Nurnberg, Inst Phys 3, D-91058 Erlangen, Germany

[2] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany

来源：

PHYSICAL REVIEW B | 2003年 / 68卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.68.153107

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the appearance of directed current in tunnel junctions (quantum ratchet effect), in the presence of an external ac field f(t). The current is established in a one-dimensional discrete inhomogeneous "tight-binding model." By making use of a symmetry analysis we predict the right choice of f(t) and obtain the directed current as a difference between electron transmission coefficients in opposite directions, DeltaT=T-LR-T-RL. Numerical simulations confirm the predictions of the symmetry analysis and moreover, show that the directed current can be drastically increased by a proper choice of frequency and amplitudes of the ac field f(t).

引用

页数：4

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