Rotating frame spin dynamics of a nitrogen-vacancy center in a diamond nanocrystal

Article

关键词: SINGLE;    ELECTRON;    DEFECTS;   

DOI  :  10.1103/PhysRevB.84.161403

来源: SCIE

【 摘 要 】

We investigate the spin dynamics of a nitrogen-vacancy (NV) center contained in an individual diamond nanocrystal in the presence of continuous microwave excitation. Upon periodic reversal of the microwave phase, we observe a train of Solomon echoes that effectively extends the system coherence lifetime to reach several tens of microseconds, depending on the microwave power and phase inversion rate. Starting from a model where the NV center interacts with a bath of paramagnetic defects on the nanocrystal surface, we use average Hamiltonian theory to compute the signal envelope from its amplitude at the echomaxima. A comparison between the effective Rabi and Solomon propagators shows that the observed response can be understood as a form of higher-order decoupling from the spin bath.

【 授权许可】

Free