Quantum interference and spectroscopy

Quantum states are characterized by how they transform under the symmetries of materials, which implies strict constraints in how they interfere with each other, scatter from impurities or respond to local spectroscopic probes. We study how we can detect the symmetry and topological nature of quantum states in solid-state experiments.

 

qpi

Relevant publications

Quasiparticle interference observation of the topologically non-trivial drumhead surface state in ZrSiTe
B. Stuart, S. Choi, J. Kim, L. Muechler, R. Queiroz, M. Oudah, L. Schoop, D. Bonn, and S. Burke, arXiv (2020)

Selection rules for quasiparticle interference with internal nonsymmorphic symmetries
R. Queiroz, and A. Stern, Phys. Rev. Lett. 121, 176401 (2018)

Surface floating 2D bands in layered nonsymmorphic semimetals: ZrSiS and related compounds
A. Topp, R. Queiroz, A. Grüneis, L. Müchler, A. W. Rost, A. Varykhalov, D. Marchenko, M. Krivenkov, F. Rodolakis, J. L. McChesney, B. V. Lotsch, L. M. Schoop, and C. R. Ast, Phys. Rev. X. 7, 041073 (2017)

Theory of quasiparticle scattering interference on the surface of topological superconductors
J. S. Hofmann, R. Queiroz, and A.P. Schnyder, Phys. Rev. B 88, 134505 (2013)