Speaker: Bogdan A. Bernevig
Affiliation: Department of Physics, Princeton University, USA
Abstract Details: A complete classification of non-interacting topological insulators with time-reversal and charge conjugation symmetry is known. It contains many cases in which no topological class can be defined - for example classes with spineless time-reversal symmetry. We show that the introduction of point-group symmetry provides a grading which gives rise to many new topological classes which are outside the regular table of topological insulators. Simple examples are topological insulators stabilized by rotational C_n and spineless time-reversal symmetry. We provide a classification of such crystalline topological states and analyze their possible appearance in electronic systems and photonics crystals.Click HERE for directions

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