Triplet-blockaded Josephson supercurrent in double quantum dots
Artikel i vetenskaplig tidskrift, 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.

Författare

Daniël Bouman

TU Delft

Ruben J.J. Van Gulik

TU Delft

Gorm Steffensen

Niels Bohr Institute

Dávid Pataki

Budapesti Muszaki es Gazdasagtudomanyi Egyetem

Péter Boross

MTA KFKI RMKI

P. Krogstrup

Niels Bohr Institute

J. Nygard

Niels Bohr Institute

Jens Paaske

Niels Bohr Institute

András Pályi

Budapesti Muszaki es Gazdasagtudomanyi Egyetem

Attila Geresdi

TU Delft

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Physical Review B

24699950 (ISSN) 24699969 (eISSN)

Vol. 102 22 220505

Ämneskategorier

Annan fysik

Teoretisk kemi

Den kondenserade materiens fysik

DOI

10.1103/PhysRevB.102.220505

Mer information

Senast uppdaterat

2021-01-12