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説明:

In this paper, the controllability of the nitrogen concentration in diamond was evaluated for 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 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 10% of the nitrogen at the substitutional site became NV− centers, and the negatively charged NV− centers were successfully formed preferentially. The T2 of these diamond crystals was inversely proportional to the nitrogen concentration.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: diamond, HPHT, CVD, nitrogen, NV center

刊行年月日: 2024-01-22

出版者: The Royal Society

掲載誌:

• Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences (ISSN: 1364503X) vol. 382 issue. 2265 20220322

研究助成金:

• Core Research for Evolutional Science and Technology JPMJCR1773
• MEXT Q-LEAP JPMXS0118067395
• MEXT Q-LEAP JPMXS0118068379
• JST Moonshot JPMJMS2062
• MIC R&D for construction of a global quantum cryptography network JPMI00316
• Japan Society for the Promotion of Science, Kakenhi 20H02187
• Japan Society for the Promotion of Science, Kakenhi 20H05661

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4614

公開URL: https://doi.org/10.1098/rsta.2022.0322

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更新時刻: 2024-07-31 08:30:16 +0900

MDRでの公開時刻: 2024-07-31 08:30:16 +0900