Triplet-blockaded Josephson supercurrent in double quantum dots
Journal article, 2020

Serial double quantum dots created in semiconductor nanostructures provide a versatile platform for investigating two-electron spin quantum states, which can be tuned by electrostatic gating and an external magnetic field. In this Rapid Communication, we directly measure the supercurrent reversal between adjacent charge states of an InAs nanowire double quantum dot with superconducting leads, in good agreement with theoretical models. In the even charge parity sector, we observe a supercurrent blockade with increasing magnetic field, corresponding to the spin singlet to triplet transition. Our results demonstrate a direct spin to supercurrent conversion, the superconducting equivalent of the Pauli spin blockade. This effect can be exploited in hybrid quantum architectures coupling the quantum states of spin systems and superconducting circuits.

Author

Daniël Bouman

Delft University of Technology

Ruben J.J. Van Gulik

Delft University of Technology

Gorm Steffensen

Niels Bohr Institute

Dávid Pataki

Budapest University of Technology and Economics

Péter Boross

Hungarian Academy of Sciences

P. Krogstrup

Niels Bohr Institute

J. Nygard

Niels Bohr Institute

Jens Paaske

Niels Bohr Institute

András Pályi

Budapest University of Technology and Economics

Attila Geresdi

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Delft University of Technology

Physical Review B

24699950 (ISSN) 24699969 (eISSN)

Vol. 102 22 220505

Subject Categories

Other Physics Topics

Theoretical Chemistry

Condensed Matter Physics

DOI

10.1103/PhysRevB.102.220505

Related datasets

Triplet-blockaded Josephson supercurrent in double quantum dots [dataset]

DOI: 10.5281/zenodo.3978235

More information

Latest update

9/25/2023