Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Status Confirmed
Seminar Series LPA
Subjects cond-mat
Date Monday 15 January 2018
Time 13:30
Institute LPA
Seminar Room L363-365
Speaker's Last Name Bernevig
Speaker's First Name Andrei
Speaker's Email Address
Speaker's Institution Department of Physics, Princeton University
Title Topological Quantum Chemistry
Abstract The past decade has seen tremendous success in predicting and experimentally discovering distinct classes of topological insulators (TIs) and semimetals. We review the field and we propose an electronic band theory that highlights the link between topology and local chemical bonding, and combines this with the conventional band theory of electrons. Topological Quantum Chemistry is a description of the universal global properties of all possible band structures and materials, comprised of a graph theoretical description of momentum space and a dual group theoretical description in real space. We classify the possible band structures for all 230 crystal symmetry groups that arise from local atomic orbitals, and show which are topologically nontrivial. We show how our topological band theory sheds new light on known TIs, and demonstrate the power of our method to predict a plethora of new TIs. All the results are available on the Bilbao Crystallographic Server.
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