Dresden 2020 – wissenschaftliches Programm
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TT 65.18: Poster
Donnerstag, 19. März 2020, 15:00–19:00, P2/EG
Signatures of the Majorana spin and nonlocality in the electrical transport through a Majorana - quantum dot hybrid system — •Alexander Schuray1, Manuel Rammler1, and Patrik Recher1,2 — 1Institute for Mathematical Physics, TU Braunschweig, D-38106 Braunschweig, Germany — 2Laboratory for Emerging Nanometrology Braunschweig, D-38106 Braunschweig, Germany
We investigate the electronic transport properties of a Majorana bound state (MBS) system in which more than one MBS is coupled to a spinful normal conducting lead on one side and a quantum dot on the other side. We use the full counting statistics to show that the only process contributing to the current is Andreev reflection in up to two channels that can be attributed to the two spin channels in the lead. The coupled quantum dot leads to the emergence of Fano resonances and the symmetry properties of these give insight about the coupling strength to both MBSs. We support our findings using a numerical tight binding model of a spin orbit coupled nanowire in proximity to a superconductor with an applied Zeeman field and treat the quantum dot using a self consistent mean field theory for the Coulomb interaction on the quantum dot.