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

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

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.

Keywords: graphene spin-orbit interaction Green's function theory

Received: 30 March 2012
Revised: 04 June 2012
Accepted manuscript online:

PACS:	73.43.-f	(Quantum Hall effects)
	73.20.Hb	(Impurity and defect levels; energy states of adsorbed species)
	73.61.Wp	(Fullerenes and related materials)

Fund: 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).

Corresponding Authors: Zhu Guo-Bao
E-mail: zhuguobao@gmail.com

Cite this article:

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

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

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