Spin-Relaxation of Dipolar-Coupled Nitrogen-Vacancy Centers : The role of Double-flip Processes

Pellet-Mary, C.; Perdriat, M.; Huillery, P.; Hétet, G.

doi:10.48550/arxiv.2207.13899

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Nv-center Ground State1

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2023

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“…Through dipolar interactions, these spins can depolarize the entire ensemble at zero-field. It was also observed that there is a significant contribution of local electric fields and the interaction between same and differently oriented NVs on depolarization at zero-field for high-density samples [24].…”

Section: Nv-center Ground Statementioning

confidence: 90%

Zero-field microwave-free magnetometry with ensembles of nitrogen-vacancy centers in diamond

Dhungel¹,

Lenz²,

Omar³

et al. 2023

Preprint

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We study cross-relaxation features near zero magnetic field with ensembles of nitrogen-vacancy (NV) centers in diamond and examine their properties in samples with a range (0.9 ppm -16.0 ppm) of NV concentrations. The observed NV-NV cross-relaxation features between differently oriented NV centers in high ( 0.9 ppm)-NV-density samples hold promise for a variety of magnetometry applications where microwave fields (or any bias field) disturb the system under study. We theoretically determine the values of the bias magnetic fields corresponding to cross-relaxations between different axes and experimentally validate them. The behavior of zero-field cross-relaxation features as a function of temperature is also investigated. The sensitivity of magnetometry based on this method is determined to be in the 10 nT/ √ Hz range.

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Section: Nv-center Ground Statementioning

confidence: 90%