期刊
PHYSICAL REVIEW B
卷 96, 期 8, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.96.085418
关键词
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资金
- Ministerio de Economia y Competitividad [FIS2015-65706-P, FIS2015-64654-P, FIS2016-80434-P]
- Ramon y Cajal Program [RYC-2011-09345, RYC-2013-14645]
- Maria de Maeztu Program for Units of Excellence in RD [MDM-2014-0377]
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 nonlocality 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 nonlocality through a local transport measurement. Moreover, the spin polarization of dot subgap 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.
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