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

IEICE Transactions on Electronics

Superconducting Technology for Digital Applications Using Niobium Josephson Junctions

Shuichi Tahara, Hideaki Numata, Shinichi Yorozu, Yoshihito Hashimoto, Shuichi Nagasawa

Published Jan 25, 2000• 3 citations
OpenAlex

Related papers

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

Josephson Digital and Analog Devices with Niobium Junctions

S. Hasuo

Springer eBooks•Jan 1, 1989•0 citations

Fabrication of ferromagnetic Josephson junctions for Superconducting digital circuit application

Tomohiro Kamiya, Takuya Kurihara, Shozo TANIGUCHI +3 more

IEICE Technical Report; IEICE Tech. Rep.•Apr 14, 2017•0 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

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
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.
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.