Articles | Volume 1, issue 2
Magn. Reson., 1, 315–330, 2020
https://doi.org/10.5194/mr-1-315-2020
Magn. Reson., 1, 315–330, 2020
https://doi.org/10.5194/mr-1-315-2020

Research article 17 Dec 2020

Research article | 17 Dec 2020

Hyperfine spectroscopy in a quantum-limited spectrometer

Sebastian Probst et al.

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Latest update: 28 Feb 2021
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Short summary
Electron spin detection was recently demonstrated using superconducting circuits and amplifiers at millikelvin temperatures, reaching the quantum limit of sensitivity. We use such a setup to measure electron-spin-echo envelope modulation on a small number of electron spins, in two model systems: bismuth donors in silicon and erbium ions doped in CaWO4 (calcium tungstate). Our results are a proof of principle that hyperfine spectroscopy is feasible with these quantum-limited ESR spectrometers.