Article Systematic investigation of dynamic nuclear polarization with boron vacancy in hexagonal boron nitride

Yuki Nakamura ; Shunsuke Nishimura ; Takuya Iwasaki SAMURAI ORCID (National Institute for Materials Science) ; Shu Nakaharai ORCID (National Institute for Materials Science) ; Shinichi Ogawa ; Yukinori Morita ; Kenji Watanabe SAMURAI ORCID (National Institute for Materials Science) ; Takashi Taniguchi SAMURAI ORCID (National Institute for Materials Science) ; Kento Sasaki ; Kensuke Kobayashi

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Yuki Nakamura, Shunsuke Nishimura, Takuya Iwasaki, Shu Nakaharai, Shinichi Ogawa, Yukinori Morita, Kenji Watanabe, Takashi Taniguchi, Kento Sasaki, Kensuke Kobayashi. Systematic investigation of dynamic nuclear polarization with boron vacancy in hexagonal boron nitride. Physical Review B. 2025, 111 (19), 195404.

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(abstract)

Dynamic nuclear polarization (DNP) using the boron vacancy (V−B) in hexagonal boron nitride (hBN) has gained increasing attention. Understanding this DNP requires systematically investigating the optically detected magnetic resonance (ODMR) spectra and developing a model that quantitatively describes its behavior. Here, we measure the ODMR spectra of V−B in h10B15N across a wide range of magnetic fields, including the ground state level anti-crossing (GSLAC), and compare them with the results of the Lindblad-based simulation that considers a single electron spin and three neighboring 15N nuclear spins. We find the nuclear spin polarization estimated from the Lorentzian fitting of the ODMR spectra consistent with the simulation. Furthermore, our simulation successfully reproduces the experimentally obtained ODMR spectra, including the vicinity of GSLAC. By comparing these results in detail, we show that the conventional method of estimating polarization is qualitative but not quantitative. Finally, we show that symmetry-induced mechanisms of V−B limit the maximum polarization. Our study is an essential step toward a quantitative understanding of DNP using defects in hBN, and it paves the way for its quantum applications.

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Keyword: hexagonal boron nitride, dynamic nuclear polarization , vacancy, optically detected magnetic resonance

Date published: 2025-05-02

Publisher: American Physical Society (APS)

Journal:

  • Physical Review B (ISSN: 1550235X) vol. 111 issue. 19 195404

Funding:

  • The University of Tokyo JSR Fellowship
  • JST JPMJCR23I2 (CREST Grant)
  • JSPS JP24K21194 (Grants-in-Aid for Scientific Research)
  • JSPS JP23K25800 (Grants-in-Aid for Scientific Research)
  • JSPS JP22K03524 (Grants-in-Aid for Scientific Research)
  • MEXT JPMXP1224UT1056 (ARIM)
  • MEXT JPMXP1224NM0055 (ARIM)
  • Mitsubishi Foundation 202310021
  • Tohoku University Cooperative Research Project of RIEC
  • The University of Tokyo FoPM
  • The University of Tokyo WINGS Program
  • JSPS JP24KJ0692 (JSPS Young Researcher Fellowship)
  • JSPS JP24KJ0657 (JSPS Young Researcher Fellowship)

Manuscript type: Author's original (Submitted manuscript)

MDR DOI:

First published URL: https://doi.org/10.1103/physrevb.111.195404

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Updated at: 2025-05-22 09:21:19 +0900

Published on MDR: 2025-05-22 12:25:05 +0900

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