Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Physica C Superconductivity

Niobium nitride Josephson junctions: Experiment and computer simulations

Volodymyr E. Shaternik, S. Yu. Larkin, T. A. Khachaturova

Published Mar 1, 2006• 12 citations
Publisher
DOI
10.1016/j.physc.2006.01.042

Related papers

Superconducting Technology for Digital Applications Using Niobium Josephson Junctions

Shuichi Tahara, Hideaki Numata, Shinichi Yorozu +2 more

IEICE Transactions on Electronics•Jan 25, 2000•3 citations

Assessment of Overdamped SNS Niobium-Based Josephson Junctions for Digital Applications

Pascal Febvre, David Bouis, Natascia De Leo +4 more

•Jan 1, 2008•0 citations

High-performance dc SQUIDs with submicrometer niobium Josephson junctions

V. J. de Waal, T. M. Klapwijk, P. van den Hamer

Journal of Low Temperature Physics•Nov 1, 1983•24 citations

π phase shifter based on NbN-based ferromagnetic Josephson junction on a silicon substrate

Taro Yamashita, Sunmi Kim, Haruki Kato +4 more

In the field of superconducting electronics, a π phase shifter based on a ferromagnetic Josephson junction is expected to provide various advantages to classical and quantum superconducting devices. Here we report niobium nitride (NbN)-based ferromagnetic π junctions on a silicon (Si) substrate with a titanium nitride (TiN) buffer layer, which have applications to flux-bias-free flux quantum bits (qubits) and classical digital logic elements. We fabricated and characterized NbN/aluminum nitride (AlN)/NbN Josephson junctions, NbN/copper nickel (CuNi)/NbN ferromagnetic Josephson junctions, and superconducting quantum interference devices (SQUIDs) consisting of these junctions on the Si substrate. The fabricated NbN/AlN/NbN junctions showed a high junction quality suitable for qubit applications. Furthermore, the magnetic field dependence of the SQUID's critical current indicated that the NbN/CuNi/NbN junction worked as a π phase shifter on the Si substrate.

Scientific Reports•Aug 13, 2020•31 citations

Niobium based Josephson circuit technology

Atsuki Inoue, Seigo Kotani, Takeshi Imamura +1 more

Applied Superconductivity•Oct 1, 1993•3 citations

Superconducting NbN-Al hybrid technology for quantum devices

E. Mutsenik, S. Linzen, Evgeni V. Il’ichev +7 more

The high kinetic inductance of niobium nitride (NbN) thin films can be used for an implementation of compact on-chip inductances in cryoelectronic circuits. Here, for the first time, we demonstrate the implementation of a hybrid superconducting technology that includes the fabrication of standard aluminum submicron Josephson junctions and the NbN atomic layer deposition process. As an example, we fabricated and characterized a single and array of Al Josephson junctions together with NbN interconnections. The main Al Josephson junction parameters as well as NbN superconducting properties are in a good agreement with the values obtained by our standard fabrication process. The combination of technological processes for the NbN layers with Al Josephson junction allows implementing a new generation of innovative superconducting devices for different applications.

Low Temperature Physics•Jan 1, 2023•4 citations
In the field of superconducting electronics, a π phase shifter based on a ferromagnetic Josephson junction is expected to provide various advantages to classical and quantum superconducting devices. Here we report niobium nitride (NbN)-based ferromagnetic π junctions on a silicon (Si) substrate with a titanium nitride (TiN) buffer layer, which have applications to flux-bias-free flux quantum bits (qubits) and classical digital logic elements. We fabricated and characterized NbN/aluminum nitride (AlN)/NbN Josephson junctions, NbN/copper nickel (CuNi)/NbN ferromagnetic Josephson junctions, and superconducting quantum interference devices (SQUIDs) consisting of these junctions on the Si substrate. The fabricated NbN/AlN/NbN junctions showed a high junction quality suitable for qubit applications. Furthermore, the magnetic field dependence of the SQUID's critical current indicated that the NbN/CuNi/NbN junction worked as a π phase shifter on the Si substrate.
The high kinetic inductance of niobium nitride (NbN) thin films can be used for an implementation of compact on-chip inductances in cryoelectronic circuits. Here, for the first time, we demonstrate the implementation of a hybrid superconducting technology that includes the fabrication of standard aluminum submicron Josephson junctions and the NbN atomic layer deposition process. As an example, we fabricated and characterized a single and array of Al Josephson junctions together with NbN interconnections. The main Al Josephson junction parameters as well as NbN superconducting properties are in a good agreement with the values obtained by our standard fabrication process. The combination of technological processes for the NbN layers with Al Josephson junction allows implementing a new generation of innovative superconducting devices for different applications.