We present a general technique for capturing various non-trivial topologies in the band structure of materials, which often arise from spin-orbit coupling. The technique is aimed at insulators and semimetals. Of insulators, Chern, Z2, and crystalline topological insulators can be identified. Of semimetals, the technique captures non-trivial topologies associated with the presence of Weyl and Dirac points in the spectrum. A public software package -- Z2Pack -- based on this technique will be presented. Z2Pack is an easy-to-use, well documented Python package that computes topological invariants and illustrates non-trivial features of Berry curvature. It works as a post-processing tool with all major first-principles codes, as well as with tight-binding models. As such, it can be used to investigate materials with strong spin-orbit coupling.
Dominik Gresch, Alexey A. Soluyanov, Gabriel Autés, Oleg Yazyev, Bogdan A. Bernevig, David H. Vanderbilt, and Matthias Troyer, "Topological classification with Z2Pack
(Conference Presentation)," Proc. SPIE 9931, Spintronics IX, 99313J (Presented at SPIE Nanoscience + Engineering: September 01, 2016; Published: 4 November 2016); https://doi.org/10.1117/12.2239102.5167075280001.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the conference proceedings. They include the speaker's narration along with a video recording of the presentation slides and animations. Many conference presentations also include full-text papers. Search and browse our growing collection of more than 14,000 conference presentations, including many plenary and keynote presentations.
Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon