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	Quantum spin-hall effect and topologically invariant Chern numbers
	Sheng, D. N. ; Weng, Z. Y. ; Sheng, L. ; Haldane, F. D. M.
	2010-05-06 ; 2010-05-06
关键词	CONDUCTANCE Physics, Multidisciplinary
中文摘要	We present a topological description of the quantum spin-Hall effect (QSHE) in a two-dimensional electron system on a honeycomb lattice with both intrinsic and Rashba spin-orbit couplings. We show that the topology of the band insulator can be characterized by a 2x2 matrix of first Chern integers. The nontrivial QSHE phase is identified by the nonzero diagonal matrix elements of the Chern number matrix (CNM). A spin Chern number is derived from the CNM, which is conserved in the presence of finite disorder scattering and spin nonconserving Rashba coupling. By using the Laughlin gedanken experiment, we numerically calculate the spin polarization and spin transfer rate of the conducting edge states and determine a phase diagram for the QSHE.
语种	英语 ; 英语
出版者	AMERICAN PHYSICAL SOC ; COLLEGE PK ; ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/14458]
专题	清华大学
推荐引用方式 GB/T 7714	Sheng, D. N.,Weng, Z. Y.,Sheng, L.,et al. Quantum spin-hall effect and topologically invariant Chern numbers[J],2010, 2010.
APA	Sheng, D. N.,Weng, Z. Y.,Sheng, L.,&Haldane, F. D. M..(2010).Quantum spin-hall effect and topologically invariant Chern numbers..
MLA	Sheng, D. N.,et al."Quantum spin-hall effect and topologically invariant Chern numbers".(2010).

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