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Other research product . 2020

Hyperfine spectroscopy in a quantum-limited spectrometer

Probst, Sebastian; Zhang, Gengli; Rančić, Miloš; Ranjan, Vishal; Dantec, Marianne; Zhang, Zhonghan; Albanese, Bartolo; +8 Authors
Open Access
Published: 17 Dec 2020
We report measurements of electron-spin-echo envelope modulation (ESEEM) performed at millikelvin temperatures in a custom-built high-sensitivity spectrometer based on superconducting micro-resonators. The high quality factor and small mode volume (down to 0.2 pL) of the resonator allow us to probe a small number of spins, down to 5×102. We measure two-pulse ESEEM on two systems: erbium ions coupled to 183W nuclei in a natural-abundance CaWO4 crystal and bismuth donors coupled to residual 29Si nuclei in a silicon substrate that was isotopically enriched in the 28Si isotope. We also measure three- and five-pulse ESEEM for the bismuth donors in silicon. Quantitative agreement is obtained for both the hyperfine coupling strength of proximal nuclei and the nuclear-spin concentration.
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Funded by
Local quantum operations achieved through the motion of spins
  • Funder: European Commission (EC)
  • Project Code: 771493
  • Funding stream: H2020 | ERC | ERC-COG
Strong Microwave Erbium Coupling
  • Funder: European Commission (EC)
  • Project Code: 792727
  • Funding stream: H2020 | MSCA-IF-EF-ST
SNSF| Magnetic resonance at micron-scale by magneto-resistive sensors
  • Funder: Swiss National Science Foundation (SNSF)
  • Project Code: P300P2_177732
  • Funding stream: Careers;Fellowships | Advanced Postdoc.Mobility
Circuit Quantum Electrodynamics with Single Electronic and Nuclear Spins
  • Funder: European Commission (EC)
  • Project Code: 615767
  • Funding stream: FP7 | SP2 | ERC