17-21 July 2017
Santiago de Compostela, Facultade de Química
Europe/Madrid timezone

Measuring Majorana non-locality and spin structure with a quantum dot

19 Jul 2017, 16:25
Aula Química Inorgánica (Facultad de Química (USC))

Aula Química Inorgánica

Facultad de Química (USC)

Quantum Materials and Technologies (GEFES) Quantum Materials and Technologies (GEFES) II


Dr. Elsa Prada (Universidad Autónoma de Madrid)


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 wavefunction, and indirectly measure the spin-orbit coupling of the nanowire.

Primary author

Dr. Elsa Prada (Universidad Autónoma de Madrid)


Dr. Pablo San-Jose (ICMM-CSIC) Prof. Ramón Aguado (ICMM-CSIC)

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