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arXiv 2412.02005cond-mat.mes-hall
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离轴磁场中金刚石硅空位中心的能级结构

Energy level structure of diamond silicon vacancy centers in an off-axis magnetic field

Shuhao Wu, Xinzhu Li, Ian Gallagher, Lexington Mandachi, Benjamin Lawrie, Hailin Wang

AI总结:

提出一种结合理论模型、光致发光激发谱与相干布居囚禁测量的方法,用于提取离轴磁场下单个 SiV 中心的关键能级参数并验证轨道磁耦合差异。

摘要:

我们报告了一种实验方法的开发,该方法能够表征磁场中单个硅空位(SiV)中心的能级结构,并提取能级结构的关键参数。该方法建立在一个包含静态应变、动态 Jahn-Teller 耦合和磁场效应的理论模型之上,并引入了两个耦合率(分别对应基态和激发态),以表征应变与 Jahn-Teller 耦合的综合效应。利用 SiV 中心在横向磁场下能级结构的解析表达式,这两个耦合率可以直接由光致发光激发谱中两个自旋守恒跃迁之间频率间隔的测量,以及与 SiV 基态自旋态相关的相干布居囚禁共振的测量推导得出。关于能级结构对磁场幅度和方向依赖性的额外实验研究,进一步验证了该理论模型,并揭示了基态与激发态不相等的轨道磁耦合所产生的贡献。

英文摘要:

We report the development of an experimental approach that can characterize the energy level structure of an individual silicon vacancy (SiV) center in a magnetic field and extract the key parameters for the energy level structure. This approach builds upon a theoretical model that includes effects of the static strain, dynamic Jahn-Teller coupling, and magnetic field and introduces two coupling rates, one each for the ground and the excited states, to characterize the combined effects of strain and Jahn-Teller coupling. With the use of an analytical expression for the energy level structure of the SiV center under a transverse magnetic field, these two coupling rates can be directly derived from the measurement of the frequency separation between two spin-conserved transitions in a photoluminescence excitation spectrum and the measurement of the coherent population trapping resonance related to the SiV ground spin states. Additional experimental studies on the dependence of the energy level structure on the magnetic field amplitude and direction further verify the theoretical model and reveal contributions from unequal orbital magnetic coupling for the ground and excited states.

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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