C.L. Degen, M. Poggio, et al.
PNAS
We show that electric field noise from surface charge fluctuations can be a significant source of spin decoherence for near-surface nitrogen-vacancy (NV) centers in diamond. This conclusion is based on the increase in spin coherence observed when the diamond surface is covered with high-dielectric-constant liquids, such as glycerol. Double-resonance experiments show that improved coherence occurs even though the coupling to nearby electron spins is unchanged when the liquid is applied. Multipulse spin-echo experiments reveal the effect of glycerol on the spectrum of NV frequency noise.
C.L. Degen, M. Poggio, et al.
PNAS
H.J. Mamin, M.H. Sherwood, et al.
Physical Review B - CMMP
D. Rugar, R. Budakian, et al.
SPIE International Symposium on Fluctuations and Noise 2003
M. Poggio, C.L. Degen, et al.
Physical Review Letters