Current-Phase Relations of Superconducting PtSi Constriction Josephson Junctions
ORAL
Abstract
In this talk, I will present our recent measurements of the current–phase relations (CPRs) in superconductor–constriction–superconductor (ScS) Josephson junctions fabricated from platinum silicide thin films on silicon substrates. We constructed dc superconducting quantum interference devices (SQUIDs) incorporating pairs of such junctions and measured their magnetic-field-dependent transport characteristics. By comparing the observed supercurrent interference patterns with numerical Ginzburg–Landau simulations, we extracted the CPRs of individual junctions and quantified their nonlinear behavior. Our results show that although the constrictions exhibit strong intrinsic nonlinearity, the effect is moderated by the kinetic inductance of the device leads, which is an important consideration for practical superconducting quantum circuit applications.
*This material is based upon work supported by the U.S. Department of Energy, Office of Science, National Quantum Information Science Research Centers, Co-design Center for Quantum Advantage (C2QA) under contract number DE-SC0012704. This research used resources of the Center for Functional Nanomaterials (CFN), which is a U.S. Department of Energy Office of Science User Facility, at Brookhaven National Laboratory under Contract No. DESC0012704.
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Presenters
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Mingzhao Liu
- Brookhaven National Laboratory (BNL)