title: Edge solitons of topological insulators and fractionalized quasiparticles in two dimensions.
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 among 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.
authors.affiliation: Department of Physics, University of California at Berkeley, Berkeley, CA 94720, USA.
authors.forename: Dung-Hai
authors.initials: DH
authors.lastname: Lee
authors.forename: Guang-Ming
authors.initials: GM
authors.lastname: Zhang
authors.forename: Tao
authors.initials: T
authors.lastname: Xiang