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Measuring Majorana non-locality and spin structure with a quantum dot by Prada, Elsa; Aguado, Ramón; San-Jose, Pablo is a scholarly article available to read on EtoBox.

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Robust zero bias transport anomalies in semiconducting nanowires with proximity-induced superconductivity have been convincingly demonstrated in various experiments. While these are compatible with the existence of Majorana zero modes at the ends of the nanowire, a direct proof of their non-locality and topological protection is now needed. Here we show that a quantum dot at the end of the nanowire may be used as a powerful spectroscopic tool to quantify the degree of Majorana non-locality through a local transport measurement. Moreover, the spin polarization of dot sub-gap states at singlet-doublet transitions in the Coulomb blockade regime allows the dot to directly probe the spin structure of the Majorana wave function, and indirectly measure the spin-orbit coupling of the nanowire.

Author

Prada, Elsa; Aguado, Ramón; San-Jose, Pablo

Published

2017

Language

EN