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 220505Subject 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