Article Nitrogen concentration control during diamond growth for NV − centre formation

T. Teraji SAMURAI ORCID (National Institute for Materials Science) ; C. Shinei SAMURAI ORCID (National Institute for Materials Science) ; Y. Masuyama ; M. Miyakawa SAMURAI ORCID (National Institute for Materials Science) ; T. Taniguchi SAMURAI ORCID (National Institute for Materials Science)

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T. Teraji, C. Shinei, Y. Masuyama, M. Miyakawa, T. Taniguchi. Nitrogen concentration control during diamond growth for NV − centre formation. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 2024, 382 (2265), 20220322. https://doi.org/10.1098/rsta.2022.0322
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(abstract)

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.

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Keyword: diamond, HPHT, CVD, nitrogen, NV center

Date published: 2024-01-22

Publisher: The Royal Society

Journal:

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

Funding:

  • 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

Manuscript type: Author's version (Accepted manuscript)

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

First published URL: https://doi.org/10.1098/rsta.2022.0322

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Updated at: 2024-07-31 08:30:16 +0900

Published on MDR: 2024-07-31 08:30:16 +0900

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