Crystalline symmetry in topological materials

TYPECondensed Matter Seminar
Speaker:Raquel Queiroz
Time:14:30 - 15:30
Location:Lidow Nathan Rosen (300)
In this talk I will show how we can extract information encoded in the crystalline symmetry representations of solid state systems in order to understand how topological bands can be formed. In particular I will show in two examples how we can explore the sub- and super-group structures of symmetry representations to characterize and engineer topological phases. First, we will understand the unreasonable prevalence of topological phenomena in bismuth and related compounds; and second we will see how spatial defects can make a topologically trivial system host novel embedded topological phases. General consequences and extensions of this approach will be discussed.
[1] E. Khalaf, W. Benalcazar, T. Hughes and RQ, arXiv 1908.00011 (2019)
[2] RQ, I. C. Fulga, N. Avraham, H. Beidenkopf, J. Cano, arXiv 1809.03518 (2018)
[3] RQ, and A. Stern Phys. Rev. Lett. 123, 036802 (2019)