Статья

Signatures of Majorana Fermions in Hybrid Superconductor-Semiconductor Nanowire Devices

Vincent MourikKavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, NetherlandsKun ZuoKavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, NetherlandsSergey FrolovKavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, NetherlandsSébastien PlissardDepartment of Applied Physics, Eindhoven University of Technology, 5600 MB Eindhoven, NetherlandsErik P. A. M. BakkersDepartment of Applied Physics, Eindhoven University of Technology, 5600 MB Eindhoven, NetherlandsLeo P. KouwenhovenKavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, Netherlands

2012en

ABI

Аннотация

Majorana fermions are particles identical to their own antiparticles. They have been theoretically predicted to exist in topological superconductors. Here, we report electrical measurements on indium antimonide nanowires contacted with one normal (gold) and one superconducting (niobium titanium nitride) electrode. Gate voltages vary electron density and define a tunnel barrier between normal and superconducting contacts. In the presence of magnetic fields on the order of 100 millitesla, we observe bound, midgap states at zero bias voltage. These bound states remain fixed to zero bias, even when magnetic fields and gate voltages are changed over considerable ranges. Our observations support the hypothesis of Majorana fermions in nanowires coupled to superconductors.

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Идентификаторы

DOI: 10.1126/science.1222360

Цитирования и источники

Цитирований: 4Использованных источников: 0

Показатели — AkademScholar