6533b837fe1ef96bd12a1f01
RESEARCH PRODUCT
Temperature- and Magnetic-Field-Dependent Longitudinal Spin Relaxation in Nitrogen-Vacancy Ensembles in Diamond
S. ChemerisovDmitry BudkerDmitry BudkerVictor M. AcostaVictor M. AcostaKasper JensenAndrey JarmolaAndrey Jarmolasubject
Materials scienceNitrogenFOS: Physical sciencesGeneral Physics and Astronomy02 engineering and technologyActivation energyengineering.materialSpectrum Analysis Raman01 natural sciencessymbols.namesakeVacancy defect0103 physical sciences010306 general physicsCondensed Matter - Materials ScienceCondensed matter physicsTemperatureSpin–lattice relaxationMaterials Science (cond-mat.mtrl-sci)DiamondModels Theoretical021001 nanoscience & nanotechnologyMagnetic fieldMagnetic FieldsMolecular vibrationengineeringsymbolsDiamond0210 nano-technologyRaman spectroscopyOrder of magnitudedescription
We present an experimental study of the longitudinal electron-spin relaxation time (T1) of negatively charged nitrogen-vacancy (NV) ensembles in diamond. T1 was studied as a function of temperature from 5 to 475 K and magnetic field from 0 to 630 G for several samples with various NV and nitrogen concentrations. Our studies reveal three processes responsible for T1 relaxation. Above room temperature, a two-phonon Raman process dominates, and below, we observe an Orbach-type process with an activation energy, 73(4) meV, which closely matches the local vibrational modes of the NV center. At yet lower temperatures, sample dependent cross relaxation processes dominate, resulting in temperature independent values of T1, from ms to minutes. The value of T1 in this limit depends sensitively on magnetic field and can be tuned by more than an order of magnitude.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-12-30 | Physical Review Letters |