Spin transport in a Zigzag normal/ferromagnetic graphene junction

doi:10.1088/1674-1056/24/5/057202

中国物理B ›› 2015, Vol. 24 ›› Issue (5): 57202-057202.doi: 10.1088/1674-1056/24/5/057202

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Spin transport in a Zigzag normal/ferromagnetic graphene junction

史豪晟, Vahram L. Grigoryan

Department of Physics and State Key Laboratory of Surface Physics, Fudan University, Shanghai 200433, China

收稿日期:2014-07-16 修回日期:2014-10-27 出版日期:2015-05-05 发布日期:2015-05-05

Spin transport in a Zigzag normal/ferromagnetic graphene junction

Shi Hao-Sheng (史豪晟), Vahram L. Grigoryan

Department of Physics and State Key Laboratory of Surface Physics, Fudan University, Shanghai 200433, China

Received:2014-07-16 Revised:2014-10-27 Online:2015-05-05 Published:2015-05-05
Contact: Shi Hao-Sheng E-mail:11210190010@fudan.edu.cn
About author:72.25.Mk

摘要/Abstract

摘要： We study magnetic proximity effect induced low-energy spin transport in the normal/ferromagnetic junction of a semi-infinite zigzag graphene nanoribbon. Due to the absence of a spin flip in a single interface, the spin transfer in this model can be described by the “two-spin channel” model. We identify each spin channel as either a perfect conducting or a non-conducting channel. This feature leads to spin filter in symmetric zigzag graphene nanoribbon and spin precession in antisymmetric zigzag graphene nanoribbon, and helps to directly determine the exchange-splitting intensity directly, even without an external auxiliary bias.

关键词: graphene junction, spin filter, spin transfer torque, magnetic proximity effect

Abstract: We study magnetic proximity effect induced low-energy spin transport in the normal/ferromagnetic junction of a semi-infinite zigzag graphene nanoribbon. Due to the absence of a spin flip in a single interface, the spin transfer in this model can be described by the “two-spin channel” model. We identify each spin channel as either a perfect conducting or a non-conducting channel. This feature leads to spin filter in symmetric zigzag graphene nanoribbon and spin precession in antisymmetric zigzag graphene nanoribbon, and helps to directly determine the exchange-splitting intensity directly, even without an external auxiliary bias.

Key words: graphene junction, spin filter, spin transfer torque, magnetic proximity effect

中图分类号: (Spin transport through interfaces)

72.25.Mk

史豪晟, Vahram L. Grigoryan. Spin transport in a Zigzag normal/ferromagnetic graphene junction[J]. 中国物理B, 2015, 24(5): 57202-057202.

Shi Hao-Sheng (史豪晟), Vahram L. Grigoryan. Spin transport in a Zigzag normal/ferromagnetic graphene junction[J]. Chin. Phys. B, 2015, 24(5): 57202-057202.

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Spin transport in a Zigzag normal/ferromagnetic graphene junction

Spin transport in a Zigzag normal/ferromagnetic graphene junction

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