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arXiv 2601.04418cond-mat.mtrl-sci
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钻石中的氧:ST1自旋中心的热稳定性及氧双原子复合物的形成

Oxygen in diamond: thermal stability of ST1 spin centres and creation of oxygen-pair complexes

Felix-Bloch Institute for Solid-State Physics, Universität Leipzig(莱比锡大学);Physics Department, University of Torino(都灵大学);Instituto Nazionale di Fisica Nucleare (INFN), Sezione di Torino(意大利国家核物理研究所);Instituto Nazionale di Ricerca Metrologica (INRiM)(意大利国家计量研究所);IRCP, CNRS, PSL Research University(巴黎文理研究大学);LSPM-CNRS, UPR 3407, Université Sorbonne Paris Nord(索邦巴黎北大学);GEMaC-CNRS/USVQ, Université Paris-Saclay(巴黎萨克雷大学)
Paul Neugebauer, Xinxi Huang, Chloe Newsom, Christophe Arnold, Hjørdis Martelock, Séverine Diziain, Edoardo Monnetti, Jocelyn Achard, Tobias Lühmann, Paolo Oliv… 展开作者

Paul Neugebauer, Xinxi Huang, Chloe Newsom, Christophe Arnold, Hjørdis Martelock, Séverine Diziain, Edoardo Monnetti, Jocelyn Achard, Tobias Lühmann, Paolo Olivero, Jan Meijer, Julien Barjon, Alexandre Tallaire, Sébastien Pezzagna

AI总结:

本研究通过离子注入揭示了钻石中ST1自旋中心的热稳定性及氧双原子复合物的形成条件,为理解氧相关缺陷的原子结构提供了关键数据。

摘要:

关于钻石中氧相关缺陷的信息很少。最近,一种在室温下具有前景的自旋中心ST1被识别为氧中心,但其原子结构和热稳定性仍未知。在本工作中,我们报告了通过不同深度和辐照条件下的氧离子注入,获得了光学活性的氧相关中心及其形成条件。更具体地说,我们确定了ST1中心的温度形成/稳定性范围,其最大值约为1100°C,比NV中心更窄。在这些条件下,对小规模ST1团簇进行了光学检测磁共振(ODMR)测量,在300K时具有大于20%的自旋读出对比度。在阴极发光中,535 nm的ST1峰未被观测到。此外,对于O₂分子离子的注入,测量到了一个以460 nm为中心的宽峰。对于1500°C的退火温度,形成了一种不同的中心(其ZPL在584.5 nm),其强度随注入辐照度呈幂律依赖关系(1.5 < p < 1.9)。这表明该中心含有两个氧原子。此外,还观察到了一个新的与内在缺陷相关的光谱特征,有四个显著的谱线(尤其是594 nm处)。最后,本文呈现的钻石中氧中心的热形成和稳定性对于通过从头计算确定如ST1和可能的O₂Vₓ复合物等缺陷的原子结构至关重要。事实上,缺陷中心的形成能和电荷状态比完整的能级方案更容易计算,而后者至今仍未能成功应用于ST1中心。

英文摘要:

Little is known about oxygen-related defects in diamond. Recently, the promising room-temperature spin centre named ST1 was identified as an oxygen centre, but of still unknown atomic structure and thermal stability. In this work, we report on the optically active oxygen-related centres and the conditions for their formation, using ion implantation of oxygen in various conditions of depth and fluence. More specifically, we establish the temperature formation/stability range of the ST1 centre, which has a maximum at about 1100°C and is narrower than for NV centres. In these conditions, optically detected magnetic resonance (ODMR) on small ST1 ensembles was measured with a spin readout contrast of > 20% at 300K. In cathodoluminescence, the 535 nm ST1 peak is not observed. Besides, a broad peak centred at 460 nm is measured for implantation of O$_2$ molecular ions. For an annealing temperature of 1500°C, a different centre is formed (with ZPL at 584.5 nm) with an intensity increasing with a power law 1.5 < p < 1.9 dependence from the implantation fluence. This suggests that this centre contains two oxygen atoms. Besides, a new spectral feature associated to an intrinsic defect was also observed, with four prominent lines (especially at 594nm). Finally, the thermal formation and stability of oxygen centres in diamond presented here are important for the identification of the atomic structure of defects such as the ST1 and possible O$_2$V$_x$ complex by means of ab initio calculations. Indeed, the formation energies and charge states of defect centres are easier to compute than the full energy level scheme, which to date still remains unsuccessful regarding the ST1 centre.

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