Edge solitons of topological insulators and fractionalized quasiparticles in two dimensions

2007/05/31 by Dung-Hai Lee, Guang-Ming Zhang, Tao Xiang · 1 citation
Physics and Astronomy · #cond-mat.str-el #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevlett.99.196805

published as Physical Review Letters, 99, 196805 (2007) · 4 pages, 4 figures. The figures have been revised. accepted for publication by Physical Review Letters

arxiv created 2007/10/11 · arxiv updated 2009/12/01

Abstract

An important characteristic of topological band insulators is the necessary presence of in-gap edge states on the sample boundary. We utilize this fact to show that when the boundary is reconnected with a twist, there are always zero-energy defect states. This provides a natural connection between novel defects in the two-dimensional p_x+ip_y superconductor, the Kitaev model, the fractional quantum Hall effect, and the one-dimensional domain wall of polyacetylene.

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