Characterization of three-dimensional topological insulators by two-dimensional invariants

Details Characterization of three-dimensional topological insulators by two-dimensional invariants Characterization of three-dimensional topological insulators by two-dimensional invariants

Jun 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010njph...12f5009r&link_type=abstract

New Journal of Physics, Volume 12, Issue 6, pp. 065009 (2010).

Physics

7

Scientific paper

The prediction of nontrivial topological phases in Bloch insulators in three dimensions has recently been experimentally verified. Here, I provide a picture for obtaining the Z2 invariants for a three-dimensional (3D) topological insulator by deforming suitable 2D planes in momentum space and by using a formula for the 2D Z2 invariant based on the Chern number. The physical interpretation of this formula is also clarified through the connection between this formulation of the Z2 invariant and the quantization of spin Hall conductance in two dimensions.

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