Broadband electron spin resonance spectroscopy with a superconducting resonator, Part 2 : Experiments
ORAL
Abstract
Electron spin resonance (ESR) spectroscopy is a useful characterization tool for quantum materials that is traditionally limited in terms of sensitivity, probing frequency, and volume. Here, we present an alternative: a longitudinal spin-cavity coupling mechanism based on the effects of the spin polarization on high-kinetic-inductance superconducting resonators. This interaction allows for broadband measurements to probe spin transitions.
We report experimental evidence of this longitudinal spin-resonator interaction where the resonator is affected by the spins polarization for detunings between the spin and the resonator larger than 1 GHz, where the contribution of the dispersive interaction is vanishing. In the specific implementation, numerical simulations show that the main contributions come from near-surface spins. This novel coupling can lead to new characterization tools and methods of quantum defects, complex quantum materials and many other paramagnetic systems.
We report experimental evidence of this longitudinal spin-resonator interaction where the resonator is affected by the spins polarization for detunings between the spin and the resonator larger than 1 GHz, where the contribution of the dispersive interaction is vanishing. In the specific implementation, numerical simulations show that the main contributions come from near-surface spins. This novel coupling can lead to new characterization tools and methods of quantum defects, complex quantum materials and many other paramagnetic systems.
*This research was undertaken thanks in part to funding from the Canada First Research Excellence Fund and the Institut Transdisciplinaire de Recherche en Information Quantique.
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Presenters
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Gregory Brookes
- Institut quantique and Département de Physique, Université de Sherbrooke