2013/08/21 by Chao-Xing Liu, Rui-Xing Zhang · 1 citation
Physics and Astronomy · #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.90.085304
published as Phys. Rev. B 90, 085304 (2014) · 7 pages, 5 figures
arxiv created 2013/08/21 · arxiv updated 2015/06/17
In this work, we identify a new class of Z2 topological insulator protected by non-symmorphic crystalline symmetry, dubbed a "topological non-symmorphic crystalline insulator". We construct a concrete tight-binding model with the non-symmorphic space group pmg and confirm the topological nature of this model by calculating topological surface states and defining a Z2 topological invariant. Based on the projective representation theory, we extend our discussion to other non-symmorphic space groups that allows to host topological non-symmorphic crystalline insulators.