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cond-mat.mtrl-sci2011★ 889 cited
An equivalent expression of Z2 Topological Invariant for band insulators using Non-Abelian Berry's connection
Rui Yu, Xiao Liang Qi, Andrei Bernevig +2
We introduce a new expression for the Z2 topological invariant of band insulators using non- Abelian Berry's connection. Our expression can identify the topological nature of a gen…
cond-mat.mtrl-sci2009★ 585 cited
Emergence of the persistent spin helix in semiconductor quantum wells
Jake D. Koralek, Chris Weber, Joe Orenstein +4
According to Noethers theorem, for every symmetry in nature there is a corresponding conservation law. For example, invariance with respect to spatial translation corresponds to co…