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

作者：Song, Xuerui^*; Zhang, Jian; Feng, Fupan; Wang, Junfeng; Zhang, Wenlong; Lou, Liren; Zhu, Wei; Wang, Guanzhong

来源：AIP Advances, 2014, 4(4): 047103.

DOI：10.1063/1.4870938

• NUCLEAR-MAGNETIC-RESONANCE
• DEFECTS

We investigated the influence of spins on surface of nanodiamonds (NDs) to the longitudinal relaxation time (T-1) and transverse relaxation time (T-2) of nitrogen vacancy (NV) centers in ND. A spherical model of the NDs was suggested to account for the experimental results of T-1 and T-2, and the density of surface spins was roughly estimated based on the statistical analysis of experimental results of 72 NDs containing a single NV center. For NDs studied here, the T-1 of NV center inside is highly dependent to the surface spins of the NDs. However, for the T-2 of NV center, intrinsic contributions must be much pronounced than that by surface spins. In other words, T-1 of an NV center in NDs is more sensitive to the change of the surface spin density than T-2.

• 出版日期2014-4
• 单位中国科学技术大学