| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2024-09-02 |
| タイトル |
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タイトル |
Nitrogen Concentration Control during Diamond Growth for NV? Center Formation |
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言語 |
en |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
T. Teraji
C. Shinei
Masuyama Yuta
M. Miyakawa
T. Taniguchi
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
Negatively charged nitrogen-vacancy (NV?) centers formed in diamond crystals are point defects that have potential applications in various quantum devices such as highly sensitive magnetic sensors. To improve the sensitivity of magnetic sensors using NV? centers, it is essential to precisely control the nitrogen concentration in the crystals as well as improve the quality of diamond crystals. In this paper, we demonstrated that nitrogen concentration in diamond can be controlled with high precision for the following two representative growth methods. One is the high-pressure high-temperature (HPHT) synthesis method and the other is chemical vapor deposition (CVD) method. The nitrogen concentration in the diamond was controlled by the weight ratio of nitrogen getter material in the metal solvent in the HPHT method, and by the gas flow ratio of carbon to nitrogen in the CVD method. The nitrogen concentration of HPHT-grown diamond decreased semi-logarithmically with increasing titanium or aluminum contents in the metal solvent. The nitrogen concentration of CVD-grown diamond increased linearly with increasing the flow rate ratio of nitrogen to carbon. The diamond crystals were irradiated with 2MeV electron beams so that approximately 20% of the nitrogen at the substitutional site became NV? centers, and the negatively charged NV? centers were successfully formed preferentially. The coherence time of electron spin of NV? centers obtained by the Hahn-echo pulse sequence T2 of these diamond crystals was inversely proportional to the nitrogen concentration. A comparison of T2 between the NV? centers of HPHT- synthesized and CVD-grown diamonds showed no significant difference between them. |
| 書誌情報 |
Philosophical Transactions of the Royal Society A
巻 382,
号 2265,
p. 20220322,
発行日 2023-12
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| 出版者 |
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出版者 |
Royal Society |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
1471-2962 |
| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
10.1098/rsta.2022.0322 |
