All Nitride NbN/AlN/NbN Josephson Junctions
Abstract
Recent collaboration between Cornell and Naval Research Lab has created robust epitaxial superconductor/III-Nitride semiconductors o"n 3"" wafers. An opportunity has arisen to leverage this exciting advance in materials to create clean, atomically sharp, and high te"mperature annealable Josephson Junctions and explore their device applications, particularly in high coherence superconducting quantum computing. Here we propose a joint effort between experts in superconducting devices (Hong Tang) and III-Nitride materials (Debdeep Jena) to advance device technology based on all-Nitride Josephson junctions (NJJ). Specifically, we will focus on improving the coherence of NJJs for superconducting qubits and advance qubit operating frequency and temperatures. The epitaxial control of III-V semiconductor heterointerfaces has enabled ultrahigh speed transistors, resonant tunneling diodes, and quantum cascade lasers whose properties are simply inaccessible in polycrystalline materials. Today s most advanced superconducting devices are all based on JJ with oxide barrier sandwiched by amorphous superconductors. If successful, this program will create high quality all-nitride, oxygen-free superconducting platform and transform the state-of-the-art superconducting devices.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 17, 2020
- Source ID
- N000142012126
Entities
People
- Hongxing Tang
Organizations
- Office of Naval Research
- United States Navy
- Yale University