Disordered topological matter

Dirt and impurities are unavoidable in real physical systems. They break translation symmetry and invalidate Bloch's theorem. But can we still find order in disorder? Are there topological invariants that subside these harsh conditions?

Critical wavefunctions

Relevant publications

Delocalization transition of disordered axion insulator
Z. Song, B. Lian, R. Queiroz, R. Ilan, B. A. Bernevig, and A. Stern, Phys. Rev. Lett. 127, 016602 (2021)

Sputtering-induced reemergence of the topological surface state in Bi2Se3
R. Queiroz, G. Landolt, S. Muff, B. Slomski, T. Schmitt, V. N. Strocov, J. Mi, B. B. Iversen, Philip Hofmann, J. Osterwalder, A. P. Schnyder, and J. H. Dil, Phys. Rev. B. 93, 206405 (2016)

Helical Majorana surface states of strongly disordered topological superconductors with time-reversal symmetry
R. Queiroz, and A.P. Schnyder, Phys. Rev. B 91, 165409 (2015)

Stability of flat-band edge states in topological superconductors without inversion center.
R. Queiroz and A.P. Schnyder, Phys. Rev. B 89, 054501 (2014)