Regensburg 2025 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 36: Materials and Devices for Quantum Technology II

HL 36.7: Vortrag

Mittwoch, 19. März 2025, 16:45–17:00, H13

Stability of Majorana modes in disordered topological insulator nanowires — •Leonard Kaufhold — Institute for theoretical physics, Cologne, Germany

The possibility of Majorana bound states (MBS) in nanowire hybrid devices has sparked great interest over the past decade due to their potential application in quantum computing. In this talk, we evaluate theoretically the possibility to realize MBS in topological-insulator (TI) nanowires proximity-coupled to an s-wave superconductor with regards to one main obstacle: disorder, be it from charged impurities within the bulk of the TI or short ranged surface defects. Based on extensive numerical investigation of screening effects as well as the resulting surface states, we demonstrate, that Majorana modes can be achieved under realistic conditions.

Keywords: Topological Insulators; Majorana Fermions; Disorder