Magnetic Noise due to Interactions Between Bulk Impurities and Electrons in Nitrogen Vacancy Center Diamonds
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Abstract
Nitrogen vacancy centers (NV) diamonds present great interest as robust atomic-scale magnetic field sensors. One of the serious problems of NV-center diamond devices is electric and magnetic field noise. The noise can be verified by the optically detected magnetic resonance (ODMR) line-broadening; the noise reduce sensitivity of the devices. In this work we theoretically study the magnetic field noise caused by the magnetic dipole-dipole interactions between the bulk impurities of 13C, 14N and the electron in the NV-center. We use the cluster correlation expansion method to calculate the magnetic field fluctuations, and then, obtain the noise spectrum. The noise spectra is greater at lower frequencies but decrease at higher frequencies.