Cooper-pair splitting in two parallel InAs nanowires
(2018) In New Journal of Physics 20(6).- 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... (More)
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.
(Less)
- author
- organization
- publishing date
- 2018-06-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Andreev transport, Cooper-pair splitting, parafermions, parallel nanowires, semiconducting nanowire, topological superconductivity
- in
- New Journal of Physics
- volume
- 20
- issue
- 6
- article number
- 063021
- publisher
- IOP Publishing
- external identifiers
-
- scopus:85049409140
- ISSN
- 1367-2630
- DOI
- 10.1088/1367-2630/aac74e
- language
- English
- LU publication?
- yes
- id
- 556ab5e4-ed61-4be2-8630-52e30c0891a4
- date added to LUP
- 2018-07-16 12:28:47
- date last changed
- 2023-10-20 07:21:44
@article{556ab5e4-ed61-4be2-8630-52e30c0891a4, abstract = {{<p>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.</p>}}, author = {{Baba, S. and Jünger, C. and Matsuo, S. and Baumgartner, A. and Sato, Y. and Kamata, H. and Li, K. and Jeppesen, S. and Samuelson, L. and Xu, H. Q. and Schönenberger, C. and Tarucha, S.}}, issn = {{1367-2630}}, keywords = {{Andreev transport; Cooper-pair splitting; parafermions; parallel nanowires; semiconducting nanowire; topological superconductivity}}, language = {{eng}}, month = {{06}}, number = {{6}}, publisher = {{IOP Publishing}}, series = {{New Journal of Physics}}, title = {{Cooper-pair splitting in two parallel InAs nanowires}}, url = {{http://dx.doi.org/10.1088/1367-2630/aac74e}}, doi = {{10.1088/1367-2630/aac74e}}, volume = {{20}}, year = {{2018}}, }