4 papers
Topological phases without crystalline counterparts
Daniel Varjas, Alexander Lau, Kim Pöyhönen +3
Recent years saw the complete classification of topological band structures, revealing an abundance of topological crystalline insulators. Here we theoretically demonstrate the exi…
The influence of lattice termination on the edge states of the quantum spin Hall insulator monolayer -WTe
Alexander Lau, Rajyavardhan Ray, Daniel Varjas +1
We study the influence of sample termination on the electronic properties of the novel quantum spin Hall insulator monolayer -WTe. For this purpose, we construct an accura…
Novel topological insulators from crystalline symmetries
Alexander Lau, Carmine Ortix
We discuss recent advances in the study of topological insulators protected by spatial symmetries by reviewing three representative, theoretical examples. In three dimensions, thes…
Topological semimetals in the SnTe material class: Nodal lines and Weyl points
Alexander Lau, Carmine Ortix
We theoretically show that IV-VI semiconducting compounds with low-temperature rhombohedral crystal structure represent a new potential platform for topological semimetals. By mean…