Spin dynamics of a solid-state qubit in proximity to a superconductor
arXiv:2207.07648 · doi:10.1021/acs.nanolett.2c03250
Abstract
A broad effort is underway to understand and harness the interaction between superconductors and spin-active color centers with an eye on the realization of hybrid quantum devices and novel imaging modalities of superconducting materials. Most work, however, overlooks the complex interplay between either system and the environment created by the color center host. Here we use an all-diamond scanning probe to investigate the spin dynamics of a single nitrogen-vacancy (NV) center proximal to a high-critical-temperature superconducting film in the presence of a weak magnetic field. We find that the presence of the superconductor increases the NV spin coherence lifetime, a phenomenon we tentatively rationalize as a change in the electric noise due to a superconductor-induced redistribution of charge carriers near the NV site. We build on these findings to demonstrate transverse-relaxation-time-weighted imaging of the superconductor film. These results shed light on the complex surface dynamics governing the spin coherence of shallow NVs while simultaneously paving the route to new forms of noise spectroscopy and imaging of superconductors.
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Cited by in corpus (8)
- Spectroscopy Study on NV Sensors in Diamond-based High-pressure Devices
- Probing Vortex Dynamics in 2D Superconductors with Scanning Quantum Microscope
- Room temperature relaxometry of single nitrogen-vacancy centers in proximity to -RuCl nanoflakes
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- Nanoscale quantum imaging of field-free deterministic switching of a chiral antiferromagnet
- Low-field all-optical detection of superconductivity using NV nanodiamonds
- Widefield NV Magnetic Field Reconstruction for Probing the Meissner Effect and Critical Current Density under Pressure