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Probing dynamics of an electron-spin ensemble via a superconducting resonator

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arxiv 1208.5473 v1 pith:6NA65S6Y submitted 2012-08-27 cond-mat.mes-hall quant-ph

V. Ranjan , G. de Lange , R. Schutjens , T. Debelhoir , J. P. Groen , D. Szombati , D. J. Thoen , T. M. Klapwijk
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R. Hanson L. DiCarlo
This is my paper · ORCID
classification cond-mat.mes-hallquant-ph
keywords spindiffusionrelaxationelectron-spinensembleresonatorsub-ensemblesanother
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We study spin relaxation and diffusion in an electron-spin ensemble of nitrogen impurities in diamond at low temperature (0.25-1.2 K) and polarizing magnetic field (80-300 mT). Measurements exploit mode- and temperature-dependent coupling of hyperfine-split sub-ensembles to the resonator. Temperature-independent spin linewidth and relaxation time suggest that spin diffusion limits spin relaxation. Depolarization of one sub-ensemble by resonant pumping of another indicates fast cross-relaxation compared to spin diffusion, with implications on use of sub-ensembles as independent quantum memories.

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