Physikalisches Kolloquium |
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Speaker: | Prof. Dr. Yoichi Ando |
Date: | 20/10/2017 15:45 |
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Where: | Otto Lehmann Lecture Hall, Bldg. 30.22, KIT Campus South |
Affiliation: | University of Cologne |
Host: | Prof. Dr. Jörg Schmalian |
Abstract
Topological insulators and superconductors are new quantum states of matter that are characterized by nontrivial topological structures of the Hilbert space. Recently, they attract a lot of attention because of the appearance of exotic quasiparticles such as spin-momentum-locked Dirac fermions or Majorana fermions on their edge/surface, which hold promise for various novel applications. In particular, localized zero-energy Majorana mode is expected to obey non-Abelian statistics and enable topological quantum computing. In this talk, I will introduce the basics of those materials and present some of the key contributions we have made in this new frontier, such as the synthesis of bulk-insulating topological insulators, discovery of topological crystalline insulator, and the discovery of nematic topological superconductor.