Depth-dependent decoherence caused by surface and external spins for NV centers in diamond
Depth-dependent decoherence caused by surface and external spins for NV centers in diamond
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金刚石 NV 中心的表面和外部自旋引起的深度相关退相干
DOI：
10.1103/physrevb.96.235443
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发表时间：
2017-09
影响因子：
3.7
通讯作者：
Guanzhong Wang
中科院分区：
文献类型：
--
作者：
Wenlong Zhang;Jian Zhang;Junfeng Wang;Fupan Feng;Shengran Lin;Liren Lou;Wei Zhu;Guanzhong Wang
通过高效的纳米等离子体刻蚀，成功地将金刚石中的氮空位（NV）中心逐步引入到样品表面。在每个深度上，我们测量了表面施加外自旋前后自旋相干时间的比值，反映了外自旋对退相干的贡献，并研究了深度与比值之间的关系。随着深度的减小，比值先减小后增大，这是由于外自旋、表面自旋、离散表面自旋效应和电场噪声对退相干的影响。此外，我们的工作在实验和理论上揭示了一个特征深度，在该深度处，NV中心将经历相对最强的退相干所造成的外部自旋，考虑到不可避免的表面自旋。发现了NV中心的局域环境和表面自旋密度对特征深度的影响。
By efficient nanoscale plasma etching, the nitrogen-vacancy (NV) centers in diamond were brought to the sample surface step by step successfully. At each depth, we measured the ratios of spin coherence times before and after applying external spins on the surface, which reflected the contribution of external spins to the decoherence, and then investigated the relationships between depth and ratios. The values of ratios declined and then rose with the decreasing depth, which was attributed to the decoherence influenced by external spins, surface spins, discrete surface spin effects, and electric field noise. Moreover, our work experimentally and theoretically revealed a characteristic depth at which the NV center would experience relatively the strongest decoherence caused by external spins in consideration of inevitable surface spins. And the characteristic depth was found depending on the local environments of NV centers and the density of surface spins.
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影响因子：
3.7
作者：
J. Nakata
通讯作者：
J. Nakata
DOI：
--
发表时间：
2014
期刊：
--
影响因子：
--
作者：
T. Rosskopf;A. Dussaux;K. Ohashi;M. Loretz;R. Schirhagl;H. Watanabe;S. Shikata;K. Itoh;C. Degen-C
通讯作者：
T. Rosskopf;A. Dussaux;K. Ohashi;M. Loretz;R. Schirhagl;H. Watanabe;S. Shikata;K. Itoh;C. Degen-C
影响因子：
8.6
作者：
Kim, M.;Mamin, H. J.;Rugar, D.
通讯作者：
Rugar, D.
影响因子：
4
作者：
Ohno, Kenichi;Heremans, F. Joseph;Awschalom, David D.
通讯作者：
Awschalom, David D.
影响因子：
19.6
作者：
Grinolds, M. S.;Hong, S.;Yacoby, A.
通讯作者：
Yacoby, A.