Articles | Volume 1, issue 2
Magn. Reson., 1, 315–330, 2020
Magn. Reson., 1, 315–330, 2020

Research article 17 Dec 2020

Research article | 17 Dec 2020

Hyperfine spectroscopy in a quantum-limited spectrometer

Sebastian Probst et al.

Cited articles

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Baumann, S., Paul, W., Choi, T., Lutz, C. P., Ardavan, A., and Heinrich, A. J.: Electron paramagnetic resonance of individual atoms on a surface, Science, 350, 417–420,, 2015. a
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.