ナカハライ　シュウ   中払　周    所属   工学部 電気電子工学科    職種   教授
言語種別	英語
発行・発表の年月	2025/05
形態種別	学術論文
査読	査読あり
標題	Systematic investigation of dynamic nuclear polarization with boron vacancy in hexagonal boron nitride
執筆形態	共著
掲載誌名	PHYSICAL REVIEW B
掲載区分	国外
出版社・発行元	American Physical Society
巻・号・頁	111,pp.195404
総ページ数	15
著者・共著者	Yuki Nakamura, Shunsuke Nishimura, Takuya Iwasaki, Shu Nakaharai, Shinichi Ogawa, Yukinori Morita, Kenji Watanabe, Takashi Taniguchi, Kento Sasaki, Kensuke Kobayashi
概要	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 over a wide magnetic field range, including the ground state level anticrossing (GSLAC), and compare them with the results of the Lindblad-based simulation that considers a single electron spin and three neighboring 15N nuclear spins. Our simulation successfully reproduces the experimental spectra, including the vicinity of GSLAC. It can explain the overall behavior of the magnetic field dependence of the nuclear spin polarization estimated using the Lorentzian fitting of the spectra. Despite such qualitative agreement, we also demonstrate that the fitting methods cannot give accurate polarizations. Finally, we discuss 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 its quantum applications.
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