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arXiv 2406.07772cond-mat.mtrl-sciphysics.comp-ph
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金刚石中NV⁻色心应变与电荷诱导斯塔克效应的量子嵌入研究

Quantum embedding study of strain and charge induced Stark effects on the NV$^{-}$ center in diamond

Gabriel I. López-Morales, Joanna M. Zajac, Johannes Flick, Carlos A. Meriles, Cyrus E. Dreyer

AI总结:

本文利用量子嵌入方法研究金刚石NV⁻色心的应变与电荷诱导斯塔克效应,量化纵向和横向应变对激发态的影响,提取应变敏感性系数,并计算永久偶极和跃迁偶极。

摘要:

金刚石中的NV⁻色心因其光学和自旋性质对外部电场、磁场和应变场具有敏感性,已被证明是用于量子计量学的强大纳米传感器。鉴于这些应用,我们使用量子嵌入方法推导出NV⁻色心上应变和电荷诱导斯塔克效应的多体描述。我们量化了沿NV⁻轴向的纵向应变如何使激发态在能量上发生移动,而具有垂直于NV⁻轴分量的应变则解除³E和¹E态的简并。最大的效应出现在光学相关的³E流形上,它在横向应变下分裂为Eₓ和E_y。从这些响应中,我们提取了准线性区域内Eₓ/y态的应变敏感性系数。此外,我们研究了NV⁻的多体偶极矩阵元,发现在零应变下存在1.64 D的永久偶极,这比近期密度泛函理论计算得到的结果略小。我们还确定了Eₓ和E_y之间的跃迁偶极及其随应变的演化。

英文摘要:

The NV$^{-}$ color center in diamond has been demonstrated as a powerful nanosensor for quantum metrology due to the sensitivity of its optical and spin properties to external electric, magnetic, and strain fields. In view of these applications, we use quantum embedding to derive a many-body description of strain and charge induced Stark effects on the NV$^{-}$ center. We quantify how strain longitudinal to the axis of NV$^{-}$ shifts the excited states in energy, while strain with a component transverse to the NV$^{-}$ axis splits the degeneracies of the $^{3}E$ and $^{1}E$ states. The largest effects are for the optically relevant $^{3}E$ manifold, which splits into $E_{x}$ and $E_{y}$ with transverse strain. From these responses we extract strain susceptibilities for the $E_{x/y}$ states within the quasi-linear regime. Additionally, we study the many-body dipole matrix elements of the NV$^{-}$ and find a permanent dipole 1.64 D at zero strain, which is somewhat smaller than that obtained from recent density functional theory calculations. We also determine the transition dipole between the $E_{x}$ and $E_{y}$ and how it evolves with strain.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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