著者
Fukui Takahiro Hatsugai Yasuhiro
出版者
American Physical Society
雑誌
Physical review B (ISSN:10980121)
巻号頁・発行日
vol.75, no.12, pp.121403, 2007-03
被引用文献数
97 54

For generic time-reversal-invariant systems with spin-orbit couplings, we clarify a close relationship between the Z2 topological order and the spin Chern number (SChN) in the quantum spin-Hall effect. It turns out that a global gauge transformation connects sectors with different SChNs (even integers) modulo 4, which implies that the SChN and Z2 topological orders yield the same classification. We present a method of computing the SChN and demonstrate it in single and double planes of graphene.

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外部データベース (DOI)

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