Ab initio study of defect interactions between the negatively charged nitrogen vacancy centre and the carbon self-interstitial in diamond.

Ab initio study of defect interactions between the negatively charged nitrogen vacancy centre and the carbon self-interstitial in diamond.
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用从头算方法研究了金刚石中带负电荷的氮空位中心和自间隙碳之间的缺陷相互作用。

DOI:
10.1098/rsta.2023.0174
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发表时间:
2024-01-22
影响因子:
5
通讯作者:
Smith, Jason M.
Smith, Jason M.
中科院分区:
综合性期刊2区
文献类型:
--
作者:
Kirkpatrick, Andrew R.;Chen, Guangzhao;Witkowska, Helen;Brixey, James;Green, Ben L.;Booth, Martin J.;Salter, Patrick S.;Smith, Jason M.

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在钻石中制造氮空位中心的技术需要产生Frenkel缺陷(空位-间隙对),其组成部分可以与形成的NV中心相互作用,影响其光物理性质。在这里,我们使用密度泛函理论对缺陷间的电子和应变相互作用进行模拟,以探讨NV中心和碳自间隙在不同构型下的相互作用。我们发现,当NV中心的空位一侧存在间隙时,NV中心的e轨道和碳自间隙之间发生了杂化。我们认为这一现象可以解释在退火过程中观察到的NV中心的荧光闪烁现象。本文是西奥·墨菲会议特刊《用于量子应用的钻石》的一部分。
Fabrication techniques for nitrogen-vacancy centres in diamond require the creation of Frenkel defects (vacancy-interstitial pairs) the components of which can interact with formed NV centres affecting their photophysical properties. Here we use Density Functional Theory simulations of inter-defect electronic and strain interactions to explore how the NV centre and carbon self-interstitial interact in different configurations. We find that hybridization occurs between the NV centre e-orbitals and the carbon self-interstitial when an interstitial is present on the vacancy side of the NV centre. We propose that this phenomenon may explain the fluorescence blinking of NV centres observed during annealing. This article is part of the Theo Murphy meeting issue ‘Diamond for quantum applications’.
DOI: 10.1103/physrevb.16.1746
发表时间: 1976-01-01
期刊: PHYSICAL REVIEW B
影响因子: 3.7
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