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QI: Fachverband Quanteninformation
QI 14: Quantum Information Poster Session
QI 14.26: Poster
Mittwoch, 11. März 2026, 18:00–21:00, P4
Exploration of exotic dielectric barrier materials for quantum computing — •Leqi Zhou1, Thomas J. Smart1, Christine Falter1,2, Josua Thieme1,2, Joscha Domnick1, Benjamin Bennemann1,2, Detlev Grützmacher1, Peter Schüffelgen1, and Alexander Pawlis1,2 — 1Peter Gruenberg Institute, Forschungszentrum Juelich GmbH, Juelich, Germany — 2JARA-Fundamentals of Future Information Technology, Juelich-Aachen Research Alliance, Aachen, Germany
A majority of the modern research performed on superconducting quantum systems uses Al2O3 as the dielectric barrier material of interest. However, there has been renewed interest in alternatives to Al2O3 as a barrier material, due to the formation of two-level systems (TLSs) which can impede device performance. Within this work, we explore the deposition of alternative dielectric materials, such as AlN and TiO2. These films, grown via different epitaxy techniques are then electrically characterized to determine their resistive and capacitive properties. By optimizing the growth processes, based on these electrical measurements, we aim to implement these alternative dielectric materials into Josephson Junctions to test their suitability for future quantum computing systems.
Keywords: Dielectric; Capacitor; superconductor; Barrier; Josephson Junction