Investigation of Surface Magnetic Noise by Shallow Spins in Diamond

NMR technique for determining the depth of shallow nitrogen-vacancy centers in diamond

“…Note that the experiments, model, and analysis presented here are a more detailed treatment of this approach to determining NV depth outlined in Refs. [13][14][15][20][21][22][23][24].…”

Magnetic Resonance Detection of Individual Proton Spins Using Quantum Reporters

“…Clean (100) diamond surfaces in ambient conditions are known to host stable electron spins with S ¼ 1=2 and a g factor of 2 [13,14]. These spins have been considered to be deleterious because they are thought to cause decoherence of NV electronic spins within a few nanometers of the diamond surface [15,16]. However, with proper quantum control, the surface electron spins can be turned into a useful resource.…”

A statistical correlation investigation for the role of surface spins to the spin relaxation of nitrogen vacancy centers

“…It is worth mentioning that this surface spins density of NDs is two orders of magnitude higher than that of bulk single-crystal CVD diamond and CVD diamond thin-film as reported recently. 36,37 At last, the correlation of T 1 and T 2 of NV center in NDs was revealed by using the estimated surface spin density of σ = 1 nm −2 . The numerical simulation result also illustrated that the T 1 of NV center in ND is more sensitive to the change of the surface spin density and is more suitable to be used as a characteristic to probe outside spins than T 2 .…”

“…For surface bath spin density of 0.1 10 nm −2 , the correlation time was in the range of 0.028 ns 0.28 ns by setting r min = 0.15 nm. 25,26,36 Using thus calculated variances B 2 ⊥ , B 2 z and correlation time τ c , the relaxation times T 1 and T 2 of the NV center, located δr apart from the center of a ND of different radius and surface spin density, were calculated according to Eq. (3) and (4).…”