Multi-species optically addressable spin defects in a van der Waals material

Sam C. Scholten, Priya Singh, Alexander J. Healey, Islay O. Robertson, Galya Haim, Cheng Tan, David A. Broadway, Lan Wang, Hiroshi Abe, Takeshi Ohshima, Mehran Kianinia, Philipp Reineck, Igor Aharonovich () and Jean-Philippe Tetienne ()
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Sam C. Scholten: RMIT University
Priya Singh: RMIT University
Alexander J. Healey: RMIT University
Islay O. Robertson: RMIT University
Galya Haim: University of Melbourne
Cheng Tan: RMIT University
David A. Broadway: RMIT University
Lan Wang: RMIT University
Hiroshi Abe: National Institutes for Quantum Science and Technology (QST)
Takeshi Ohshima: National Institutes for Quantum Science and Technology (QST)
Mehran Kianinia: University of Technology Sydney
Philipp Reineck: RMIT University
Igor Aharonovich: University of Technology Sydney
Jean-Philippe Tetienne: RMIT University

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract Optically addressable spin defects hosted in two-dimensional van der Waals materials represent a new frontier for quantum technologies, promising to lead to a new class of ultrathin quantum sensors and simulators. Recently, hexagonal boron nitride (hBN) has been shown to host several types of optically addressable spin defects, thus offering a unique opportunity to simultaneously address and utilise various spin species in a single material. Here we demonstrate an interplay between two separate spin species within a single hBN crystal, namely S = 1 boron vacancy defects and carbon-related electron spins. We reveal the S = 1/2 character of the carbon-related defect and further demonstrate room temperature coherent control and optical readout of both S = 1 and S = 1/2 spin species. By tuning the two spin ensembles into resonance with each other, we observe cross-relaxation indicating strong inter-species dipolar coupling. We then demonstrate magnetic imaging using the S = 1/2 defects and leverage their lack of intrinsic quantization axis to probe the magnetic anisotropy of a test sample. Our results establish hBN as a versatile platform for quantum technologies in a van der Waals host at room temperature.

Date: 2024
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DOI: 10.1038/s41467-024-51129-8

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