The topological system with a twisting edge band: position-dependent Hall resistance

Details The topological system with a twisting edge band: position-dependent Hall resistance The topological system with a twisting edge band: position-dependent Hall resistance

2012-04-11

arxiv.org/abs/1204.2489v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We study a $\nu=1$ topological system with one twisting edge-state band and one normal edge-state band. For the twisting edge-state band, Fermi energy goes through the band three times, thus, having three edge states on one side of the sample; while the normal edge band contributes only one edge state on the other side of the sample. In such a system, we show that it consists of both topologically protected and unprotected edge states, and as a consequence, its Hall resistance depends on the location where the Hall measurement is done even for a translationally invariant system. This unique property is absent in a normal topological insulator.

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