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TT: Fachverband Tiefe Temperaturen
TT 57: Topology: Poster
TT 57.14: Poster
Wednesday, March 20, 2024, 15:00–18:00, Poster E
Majorana bound state signatures on the magnetic flux-dependent zero bias conductance — •Cajetan Heinz1, Patrik Recher1,2, and Fernando Dominguez1 — 1Institute of Mathematical Physics, Technical University of Braunschweig, D-38106 Braunschweig, Germany — 2Laboratory for Emerging Nanometrology Braunschweig, D-38106 Braunschweig, Germany
We propose a theoretical framework designed to unravel the p-wave character of the Majorana bound state (MBS) through an analysis of the periodicity in the flux-dependent zero-bias conductance. Our goal is to obtain an experimentally detectable signal that cannot be mimicked by zero energy Andreev bound states. We use a tight-binding model that describes a quantum spin Hall insulator (QSHI) - topological superconductor junction, where a MBS is expected to form at the NS boundary. By applying a magnetic flux, we explore the scattering processes of the QSHI edge states with the MBS. This configuration manifests distinct indicators of a topological non-trivial phase even in the presence of non-zero temperatures and weak coupling between the superconductor and the normal part. Additionally, we employ a scattering network to gain insight into the underlying physics governing the junction.
Keywords: Majorana; Green's functions; Zero bias conductance; Scattering network; Tight binding