Approach to dark spin cooling in a diamond nanocrystal.
Approach to dark spin cooling in a diamond nanocrystal.
复制标题
金刚石纳米晶体中暗自旋冷却的方法。
DOI：
10.1021/nn400239n
复制
发表时间：
2013
期刊：
影响因子：
17.1
通讯作者：
C. Meriles
中科院分区：
文献类型：
--
作者：
A. Laraoui;C. Meriles
使用哈特曼-哈恩协议，我们证明了自旋极化转移从一个单一的，光学极化的氮空位（NV）中心的顺磁缺陷的合奏主办的一个单独的金刚石晶体。由于NV-浴的强耦合，转移发生在短的微秒时间尺度上。在快速重复的脉冲序列，我们观察到强烈的极化转移阻滞，我们解释为一个指示的自旋浴冷却。数值模拟表明，整个纳米粒子的旋转浴极化是不均匀的，平均约5%的晶体体积，但达到高达25%的NV附近。这些意见可能证明有关未来浴辅助磁力测试的规划。
Using a Hartman-Hahn protocol, we demonstrate spin polarization transfer from a single, optically polarized nitrogen-vacancy (NV) center to the ensemble of paramagnetic defects hosted by an individual diamond nanocrystal. Owing to the strong NV-bath coupling, the transfer takes place on a short, microsecond time scale. Upon fast repetition of the pulse sequence, we observe strong polarization transfer blockade, which we interpret as an indication of spin bath cooling. Numerical simulations indicate that the spin bath polarization is nonuniform throughout the nanoparticle, averaging approximately 5% over the crystal volume, but reaching up to 25% in the immediate vicinity of the NV. These observations may prove relevant to the planning of future bath-assisted magnetometry tests.
影响因子：
56.9
作者：
Staudacher, T.;Shi, F.;Wrachtrup, J.
通讯作者：
Wrachtrup, J.