What is it about?
Scheelite, or calcium tungstate (CaWO₄) has an exciting role to play in a myriad of contexts from tests of fundamental physics to computing. To explore the realisation of such applications, we characterise a single-crystal sample. Cryogenic multi-mode spectroscopy revealed spin defects in ultra low-loss CaWO₄. The high-Q resonator hosted dilute spin ensembles from rare-earth and transition metal ions like Gd³⁺ and Fe³⁺ with low concentrations at the level of parts-per-billion.
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Why is it important?
This material could drive advancements in quantum technology, precision metrology, and beyond-standard model physics.
Read the Original
This page is a summary of: Precision multi-mode microwave spectroscopy of paramagnetic and rare-earth ion spin defects in single crystal calcium tungstate, Applied Physics Letters, October 2024, American Institute of Physics,
DOI: 10.1063/5.0224102.
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