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arXiv 0902.2256cond-mat.mtrl-sci
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金刚石中氮空位中心激发态内的时间平均

Time-averaging within the excited state of the nitrogen-vacancy centre in diamond

L J Rogers, R L McMurtrie, S Armstrong, M J Sellars, N B Manson

摘要:

测量了含氮空位金刚石样品在不同温度下发射强度随磁场方向的变化<111>。在低温下的响应是样品和应力依赖的,并且可以根据先前对应变依赖的3E激发态精细结构的理解来建模。在室温下的响应在很大程度上是样品和应力独立的,和建模涉及调用一个应变独立的激发态与一个单一的零场分裂为1.42 GHz。行为的变化归因于在激发态轨道二重态的组件的温度依赖的平均过程。它使轨道和自旋分裂,并且在高温下自旋能级变得独立于任何轨道分裂。因此,模型可以被调和,低温和高温的参数被证明是一致的。

英文摘要:

The emission intensity of diamond samples containing nitrogen-vacancy centres are measured as a function of magnetic field along a <111> direction for various temperatures. At low temperatures the responses are sample and stress dependent and can be modeled in terms of the previous understanding of the 3E excited state fine structure which is strain dependent. At room temperature the responses are largely sample and stress independent, and modeling involves invoking a strain independent excited state with a single zero field splitting of 1.42 GHz. The change in behaviour is attributed to a temperature dependent averaging process over the components of the excited state orbital doublet. It decouples orbit and spin and at high temperature the spin levels become independent of any orbit splitting. Thus the models can be reconciled and the parameters for low and high temperatures are shown to be consistent.

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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