Local and Nonlocal Two-Electron Tunneling Processes in a Cooper Pair Splitter

We measure the rates and coupling coefficients for local Andreev, nonlocal Andreev, and elastic cotunneling processes. The nonlocal Andreev process, giving rise to Cooper pair splitting, exhibits the same coupling coefficient as the elastic cotunneling whereas the local Andreev process is more than 2 orders of magnitude stronger than the corresponding nonlocal one. Theory estimates describe the findings and explain the large difference in the nonlocal and local coupling arising from competition between electron diffusion in the superconductor and tunnel junction transparency.

Description

Funding Information: We acknowledge Fredrik Brange, Christian Flindt, Martin Leijnse, and Claes Thelander for fruitful discussions and the QuantERA project “2D hybrid materials as a platform for topological quantum computing,” Swedish National Science Foundation (Dnr 2018-00099 and 2019-04111), NanoLund, Academy of Finland Grant No. 312057 and QTF Centre of Excellence for financial support. We acknowledge the provision of facilities by Aalto University at OtaNano—Micronova Nanofabrication Centre.

DOI

10.1103/PhysRevLett.129.207703

Citation

Ranni, A, Mannila, E T, Eriksson, A, Golubev, D S, Pekola, J P & Maisi, V F 2022, ' Local and Nonlocal Two-Electron Tunneling Processes in a Cooper Pair Splitter ', Physical Review Letters, vol. 129, no. 20, 207703, pp. 1-6 . https://doi.org/10.1103/PhysRevLett.129.207703

Permanent link to this item

https://urn.fi/URN:NBN:fi:aalto-202211306670

Collections

[article-cris] Perustieteiden korkeakoulu / SCI

Show all metadata

Local and Nonlocal Two-Electron Tunneling Processes in a Cooper Pair Splitter

Access rights

URL

Journal Title

Journal ISSN

Volume Title

Authors

Date

Department

Major/Subject

Mcode

Degree programme

Language

Pages

Series

Abstract

Description

Keywords

Other note

DOI

Citation

Permanent link to this item

Collections