Superconducting Vacancy-Ordered Rock-Salt NbO Films
Source abstract
Abstract
We report molecular beam epitaxy synthesis of vacancy-ordered rock-salt NbO thin films that display superconductivity. The unique lattice structure and Nb 2+ oxidation state trigger structural and chemical instabilities in the epitaxial growth process. A comparative study of substrates identifies Al 2 O 3 (0001) as the optimal platform for realizing high-quality, single-phase films when growing at temperatures exceeding 1000 °C. The controlled NbO films exhibit superconductivity with critical temperatures up to T c = 1.37 K, comparable to bulk single crystals. This work addresses the fundamental bottlenecks encountered in the high-temperature epitaxy of transition-metal suboxide compounds while expanding the scope of available thin-film superconductors.
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Research context
OpenAlex topics: Physics of Superconductivity and Magnetism · Magnetic and transport properties of perovskites and related materials · Advanced Condensed Matter Physics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Applied Physics and Materials Science
California Institute of Technology
Institute for Quantum Information and Matter
Department of Materials Science and Engineering
Cornell University
Platform for the Accelerated Realization, Analysis, and Discovery of Interface Materials (PARADIM)
The Ohio State University
Funding
Gordon and Betty Moore Foundation · Division of Materials Research · Division of Physics
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