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Cooper-pair splitting in two parallel InAs nanowires

Baba, S. and Matsuo, S. and Kamata, H. and Jeppesen, S. and Xu, H. Q. and Schönenberger, Christian and Tarucha, S. and Jünger, Christian and Samuelson, Larry and Li, K. and Sato, Y. and Baumgartner, A.. (2018) Cooper-pair splitting in two parallel InAs nanowires. New journal of physics, 20.

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Official URL: https://edoc.unibas.ch/68888/

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Abstract

We report on the fabrication and electrical characterization of an InAs double-nanowire (NW) device consisting of two closely placed parallel NWs coupled to a common superconducting electrode on one side and individual normal metal leads on the other. In this new type of device we detect Cooper-pair splitting (CPS) with a sizeable efficiency of correlated currents in both NWs. In contrast to earlier experiments, where CPS was realized in a single NW, demonstrating an intrawire electron pairing mediated by the superconductor (SC), our experiment demonstrates an  interwire interaction mediated by the common SC. The latter is the key for the realization of zero-magnetic field Majorana bound states, or Parafermions; in NWs and therefore constitutes a milestone towards topological superconductivity. In addition, we observe transport resonances that occur only in the superconducting state, which we tentatively attribute to Andreev bound states and/or Yu-Shiba resonances that form in the proximitized section of one NW.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimentalphysik Nanoelektronik (Schönenberger)
UniBasel Contributors:Schönenberger, Christian and Jünger, Christian and Baumgartner, Andreas
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:IOP Publishing
ISSN:1367-2630
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:04 Apr 2019 16:36
Deposited On:04 Apr 2019 16:36

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