Thermally robust and oxide-managed Josephson tunnel junctions
Abstract
Cornell University propose an incubator to develop barriers to atomic diffusion to make aluminum oxide (AlOx) Josephson tunnel junctions (JJs) robust to thermal annealing and aging while retaining microwave frequency coherence properties. Specifically, we will focus on three situations for chemical barriers. 1. Barriers to surface oxide formation will be used on superconducting resonators base layers to mitigate microwave losses at the metal-air interface. 2. Barriers to chemically limit oxygen diffusion to and from the AlOx tunnel barrier to enable more thermally stable JJs. We will target barriers relevant to higher-Tc superconductor electrodes (relative to Al) for increased resilience against quasiparticle decoherence and eventual higher temperature and -frequency operation. 3. Amorphous thin film superconductor electrodes.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 14, 2024
- Source ID
- FA95502310706
Entities
People
- Valla Fatemi
Organizations
- Air Force Office of Scientific Research
- Cornell University
- United States Air Force