Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session Q48: Superconducting Qubits: Junctions
3:00 PM–5:48 PM,
Wednesday, March 6, 2024
Room: 200E
Sponsoring
Units:
DQI DCMP DMP
Chair: Joshua Mutus
Abstract: Q48.00002 : Exploring the quantum transport properties of superconductor-constriction-superconductor type devices based on platinum silicide (PtSi)*
3:12 PM–3:24 PM
Presenter:
Tharanga R Nanayakkara
(Brookhaven National Laboratory)
Authors:
Tharanga R Nanayakkara
(Brookhaven National Laboratory)
Anthony T Bollinger
(Brookhaven National Laboratory)
Ruoshui Li
(Brookhaven National Laboratory)
Chenyu Zhou
(Brookhaven National Laboratory)
Kim Kisslinger
(Brookhaven National Laboratory)
Aaron Stein
(Brookhaven National Laboratory)
Xiao Tong
(Brookhaven National Laboratory)
Yichen Jia
(Brookhaven National Laboratory)
Mingzhao Liu
(Brookhaven National Laboratory)
Charles T Black
(Brookhaven National Laboratory)
With this perspective in mind, our current endeavor centers on exploring the attributes of superconducting devices fabricated by constricting the dimensions of the devices using superconducting PtSi. To achieve this, we synthesize PtSi thin films on silicon substrates and employ a single-step electron beam lithography process, followed by reactive ion etching techniques. We will discuss the initial findings from these devices, including Josephson junctions (JJs) constructed with single constrictions and Superconducting Quantum Interference Devices (SQUIDs) constructed with double constrictions. The parameters extracted from the low temperature transport measurements, including critical temperature, coherence length, critical current density, and critical field values, will be discussed in this work.
Zhang. et al. Thin-film synthesis of superconductor-on-insulator A15 vanadium silicide. Sci Rep 11, 2358 (2021).
M. Liu and C. T. Black, “Performance analysis of superconductor-constriction-superconductor transmon qubits,” (2023), arXiv:2301.04276
*This material is based upon work supported by the U.S. Department of Energy, Office of Science, National Quantum Information Science Research Centers, Codesign Center for Quantum Advantage (C2QA) under contract number DE-SC0012704. This research used computational 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. DE-SC0012704.
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