Regensburg 2019 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 18: Poster Session: Topological Topics (joint session TT/MA)

TT 18.7: Poster

Montag, 1. April 2019, 15:00–18:30, Poster D

Edge currents as a probe of the strongly spin-polarized topological noncentrosymmetric superconductors — •M. Biderang^1,2, M.H. Zare³, H. Yavari², P. Thalmeier⁴, and A. Akbari^1,5 — ¹Asia Pacific Center for Theoretical Physics, POSTECH, Pohang, Korea — ²Department of Physics, University of Isfahan, Isfahan, Iran — ³Department of Physics, Faculty of Science, Qom University of Technology, Qom, Iran — ⁴Max Planck Institute for Chemical Physics of Solids, Dresden, Germany — ⁵Department of Physics, POSTECH, Pohang, Korea

Recently the influence of antisymmetric spin-orbit coupling has been studied in novel topological superconductors such as half-Heusler compounds and artificial heterostructures. We investigate the effect of Rashba and/or Dresselhaus spin-orbit couplings on the band structure and topological properties of a two-dimensional noncentrosymmetric superconductor. For this goal, the topological helical edge modes are analyzed for different spin-orbit couplings as well as for several superconducting pairing symmetries. To explore the transport properties, we examine the response of the spin-polarized edge states to an exchange field in a superconductor-ferromagnet heterostructure. The broken chiral symmetry causes the unidirectional currents at opposite edges[1].
M. Biderang et al., Phys. Rev. B 98, 014524 (2018)