We investigate a ballistic InSb nanoflag-based Josephson junction with Nb superconducting contacts. The high transparency of the superconductor-semiconductor interfaces enables the exploration of quantum transport with parallel short and long conducting channels. Under microwave irradiation, we observe half-integer Shapiro steps that are robust to temperature, suggesting their possible nonequilibrium origin. Our results demonstrate the potential of ballistic InSb nanoflags Josephson junctions as a valuable platform for understanding the physics of hybrid devices and investigating their nonequilibrium dynamics.

Half-integer Shapiro steps in highly transmissive InSb nanoflag Josephson junctions

Iorio, Andrea
;
Heun, Stefan
2023

Abstract

We investigate a ballistic InSb nanoflag-based Josephson junction with Nb superconducting contacts. The high transparency of the superconductor-semiconductor interfaces enables the exploration of quantum transport with parallel short and long conducting channels. Under microwave irradiation, we observe half-integer Shapiro steps that are robust to temperature, suggesting their possible nonequilibrium origin. Our results demonstrate the potential of ballistic InSb nanoflags Josephson junctions as a valuable platform for understanding the physics of hybrid devices and investigating their nonequilibrium dynamics.
2023
Settore FIS/03 - Fisica della Materia
   Andreev qubits for scalable quantum computation
   AndQC
   European Commission
   Horizon 2020 Framework Programme
   828948

   Thermoelectric detector based on superconductor-ferromagnet heterostructures
   SUPERTED
   European Commission
   Horizon 2020 Framework Programme
   800923

   Gate Tuneable Superconducting Quantum Electronics.
   SuperGate
   European Commission
   Horizon 2020 Framework Programme
   964398
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/127902
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