Topological defects

Topology reflects how the collection of filled electrons transform under the symmetries of the crystal. They can often show robust vortices in momentum space, robust to any local perturbation in the material. How do we see these topological objects? By looking at real space lattice defects. Dislocations, edges, disclinations, vacancies. Lattice defects in topological materials bind robust electronic modes with unusual properties. 


Relevant publications

Partial lattice defects in higher-order topological insulators
R. Queiroz, I. C. Fulga, N. Avraham, H. Beidenkopf, J. Cano, . Phys. Rev. Lett. 123, 266802 (2019)

Resolving the Topological Classification of Bismuth with Topological Defects
A. K. Nayak, J. Reiner, R. Queiroz, H. Fu, C. Shekhar, B. Yan, C. Felser, N. Avraham, H. Beidenkopf, Science Advances 5, eaax6996 (2019)