Physics & Astronomy CM/BIO/ECE Seminar Series

Wednesday, August 29, 2018 4:00pm

Physics Library, Room 223A, Physics Building


Prof. Tay-Rong Chang

The MU Physics & Astronomy Department’s Condensed Matter - Biological Physics - Electrical & Computer Engineering seminar series presents Prof. Tay-Rong Chang, National Cheng-Kung University, "Topological Crystalline Insulator: from Symmetry Indicators to Material Discovery," Wednesday, August 29, 2018, 4:00 p.m. Refreshments will be served beginning at 3:30 p.m.

Prof. Tay-Rong Chang writes, "Topological crystalline insulators (TCI) are insulating electronic phases of matter with nontrivial topology originating from crystalline symmetries. In the past decade,many materials have been demonstrated to be the topological insulators or the topological semimetals, however the exotic TCI states have remained elusive. Building upon recent theoretical works, we develop a feasible method to uniquely determine the novel rotational symmetry topological invariants based on first-principles calculations. In this talk, I will show how we predict new TCI materials and display their unusual electronic structures that entirely distinct from traditional topological materials [1].[1] Xiaoting Zhou et al., Topological crystalline insulator states in the Ca2As family, arXiv:1805.05215 (2018)."