Dynamical localization effect in a coupled quantum dot array driven by an AC magnetic field

We have studied the transport properties of a ring-coupled quantum dot array driven by an AC magnetic field, which is connected to two leads, and we give the response of the transport current to the dynamical localization. We found that when the ratio of the magnetic flux to the total quantum dots n...

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Bibliographic Details
Published in:Chinese physics B 2011-09, Vol.20 (9), p.403-407, Article 097306
Main Author: 夏俊杰 聂一行
Format: Article
Language:English
Subjects:
Alternating current
Arrays
Dipping
Localization
Magnetic fields
Position (location)
Quantum dots
Transport
交流磁场
交通运输
传输特性
动力定位
导线连接
磁场耦合
贝塞尔函数
量子点阵列
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Summary:We have studied the transport properties of a ring-coupled quantum dot array driven by an AC magnetic field, which is connected to two leads, and we give the response of the transport current to the dynamical localization. We found that when the ratio of the magnetic flux to the total quantum dots number is a root of the zeroth order Bessel function, dynamical localization and collapse of quasi-energy occurs and importantly~ the transport current displays a dip which is the signal of dynamical localization. The dynamical localization effect is strengthened as a result of the increase of the quantum dot number, and it is weakened on account of the increase of the dots-lead hopping rate.
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/20/9/097306