Spin Hall and spin Nernst effects in graphene with intrinsic and Rashba spin-orbit interactions

doi:10.1088/1674-1056/21/11/117309

中国物理B ›› 2012, Vol. 21 ›› Issue (11): 117309-117309.doi: 10.1088/1674-1056/21/11/117309

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

Spin Hall and spin Nernst effects in graphene with intrinsic and Rashba spin-orbit interactions

朱国宝

Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

收稿日期:2012-03-30 修回日期:2012-06-04 出版日期:2012-10-01 发布日期:2012-10-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 10934010), and the National Key Basic Research Special Foundation of China (Grant Nos. 2011CB921502 and 2012CB821305).

Spin Hall and spin Nernst effects in graphene with intrinsic and Rashba spin-orbit interactions

Zhu Guo-Bao (朱国宝 )

Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

Received:2012-03-30 Revised:2012-06-04 Online:2012-10-01 Published:2012-10-01
Contact: Zhu Guo-Bao E-mail:zhuguobao@gmail.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 10934010), and the National Key Basic Research Special Foundation of China (Grant Nos. 2011CB921502 and 2012CB821305).

摘要/Abstract

摘要： Spin Hall and spin Nernst effects in graphene are studied based on Green's function formalism. We calculate intrinsic contributions to spin Hall and spin Nernst conductivities in Kane-Mele model with various structures. When both intrinsic and Rashba spin-orbit interactions are present, their interplay leads to some characteristics of the dependence of spin Hall and spin Nernst conductivities on the Fermi level. When Rashba spin-orbit interaction is smaller than intrinsic spin-orbit coupling, a weak kink in the conductance appears. The kink disappears and a divergence appears when the Rashba spin-orbit interaction enhances. When the Rashba spin-orbit interaction approaches and is stronger than intrinsic spin-orbit coupling, the divergence becomes more obvious.

关键词: graphene, spin-orbit interaction, Green's function theory

Abstract: Spin Hall and spin Nernst effects in graphene are studied based on Green's function formalism. We calculate intrinsic contributions to spin Hall and spin Nernst conductivities in Kane-Mele model with various structures. When both intrinsic and Rashba spin-orbit interactions are present, their interplay leads to some characteristics of the dependence of spin Hall and spin Nernst conductivities on the Fermi level. When Rashba spin-orbit interaction is smaller than intrinsic spin-orbit coupling, a weak kink in the conductance appears. The kink disappears and a divergence appears when the Rashba spin-orbit interaction enhances. When the Rashba spin-orbit interaction approaches and is stronger than intrinsic spin-orbit coupling, the divergence becomes more obvious.

Key words: graphene, spin-orbit interaction, Green's function theory

中图分类号: (Quantum Hall effects)

73.43.-f

73.20.Hb (Impurity and defect levels; energy states of adsorbed species) 73.61.Wp (Fullerenes and related materials)

朱国宝 . Spin Hall and spin Nernst effects in graphene with intrinsic and Rashba spin-orbit interactions[J]. 中国物理B, 2012, 21(11): 117309-117309.

Zhu Guo-Bao (朱国宝 ). Spin Hall and spin Nernst effects in graphene with intrinsic and Rashba spin-orbit interactions[J]. Chin. Phys. B, 2012, 21(11): 117309-117309.

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Spin Hall and spin Nernst effects in graphene with intrinsic and Rashba spin-orbit interactions

Spin Hall and spin Nernst effects in graphene with intrinsic and Rashba spin-orbit interactions

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