Controllable Spin-Polarization of Electronic Transport through a Magnetic Quantum Dot in the Influence of Microwave Field

Yun Qing Zhou; Jian Ming Yao; Ling Min Kong; Rui Wang

doi:10.4028/www.scientific.net/MSF.663-665.466

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HomeMaterials Science ForumMaterials Science Forum Vols. 663-665Controllable Spin-Polarization of Electronic...

Controllable Spin-Polarization of Electronic Transport through a Magnetic Quantum Dot in the Influence of Microwave Field

Abstract:

The evolution operator method is applied to studying the time-dependent and spin-related electron transport through a magnetic quantum dot coupled to two normal-metal leads. When the microwave field is applied on quantum dot there are additional peaks of PAT current besides the main peak of resonant tunneling current, and the energy distance between peaks relate to the frequency of microwave fields. Furthermore, owe to the spin non-degeneration in the magnetic quantum dot, the spin-up and spin-down current peaks are separated, and the separated distance depends on Zeeman energy. These effects allow us to propose a scheme to control the magnitude and spin polarization of current.

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Materials Science Forum (Volumes 663-665)

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466-469

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https://doi.org/10.4028/www.scientific.net/MSF.663-665.466

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Online since:

November 2010

Authors:

Yun Qing Zhou, Jian Ming Yao, Ling Min Kong, Rui Wang

Keywords:

Electronic Transport, Microwave Field, Quantum Dot (QD), Spin-Polarization

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