Current-Phase Relations of Superconducting PtSi Constriction Josephson Junctions

Nanayakkara, Tharanga R.; Bollinger, Anthony T.; Musick, Kevin; Murray, Thomas; Bhatia, Ekta; Papa Rao, Satyavolu; Black, Charles T.; Liu, Mingzhao

doi:10.1021/acs.nanolett.5c04738

Current-Phase Relations of Superconducting PtSi Constriction Josephson Junctions

Journal Article · Tue Jan 06 00:00:00 EST 2026 · Nano Letters

DOI:https://doi.org/10.1021/acs.nanolett.5c04738· OSTI ID:3021697

Nanayakkara, Tharanga R. ^[1]; Bollinger, Anthony T. ^[1]; Musick, Kevin ^[2]; Murray, Thomas ^[2]; Bhatia, Ekta ^[2]; ^[2]; Black, Charles T. ^[1]; ^[1]

Brookhaven National Laboratory (BNL), Upton, NY (United States)
NY CREATES, Albany, NY (United States)

Here, we study the current-phase relations of superconductor–constriction–superconductor Josephson junctions made from platinum silicide thin films by fabricating dc-superconducting quantum interference devices incorporating pairs of junctions and measuring their magnetic-field-dependent electrical transport. By comparing the supercurrent interference patterns with numerical Ginzburg–Landau simulations, we extract the current-phase relations of individual junctions and quantify the degree of nonlinearity. These measurements show that while the constrictions themselves sustain substantial nonlinearity, the effect is moderated by the kinetic inductance of the device leads, which is an important consideration for practical superconducting circuit applications.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)

Grant/Contract Number:: SC0012704

OSTI ID:: 3021697

Report Number(s):: BNL--229481-2026-JAAM

Journal Information:: Nano Letters, Journal Name: Nano Letters Journal Issue: 2 Vol. 26; ISSN 1530-6992; ISSN 1530-6984

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
SQUID
constriction
current-phase relations
platinum silicide
superconductivity

Current-Phase Relations of Superconducting PtSi Constriction Josephson Junctions

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