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Condensed Matter and Statistical Physics Journal Club

Date: Oct 06, 2009
Title: "Topological defects in topological insulators"
Speaker: Sambuddha Sanyal.
Abstract: I will discuss the results of a recent article by Y. Ran, Y.Zhang and A.Vishwanath (DOI: 10.1038/NPHYS1220) on 1-D topologically protected modes in topological insulators with lattice dislocations. I will start with a short introduction to general idea of topological defects and topological insulators and specialty of them. Then I will follow the article and discuss how dislocation lines are associated with 1-D fermionic excitations in a 'topological insulators' a novel phase of matter and how this modes are topologically protected without being scattered by disorder. Which will lead to a discussion of experimental consequences of creating a potentially ideal quantum wire in a bulk solid.