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Single-spin resonance in a van der Waals embedded paramagnetic defect

Title
Single-spin resonance in a van der Waals embedded paramagnetic defect
Authors
Chejanovsky, NathanMukherjee, AmlanGeng, JianpeiChen, Yu-ChenKim, YoungwookDenisenko, AndrejFinkler, AmitTaniguchi, TakashiWatanabe, KenjiDasari, Durga Bhaktavatsala RaoAuburger, PhilippGali, AdamSmet, Jurgen H.Wrachtrup, Joerg
DGIST Authors
Chejanovsky, Nathan; Mukherjee, Amlan; Geng, Jianpei; Chen, Yu-Chen; Kim, Youngwook; Denisenko, Andrej; Finkler, Amit; Taniguchi, Takashi; Watanabe, Kenji; Dasari, Durga Bhaktavatsala Rao; Auburger, Philipp; Gali, Adam; Smet, Jurgen H.; Wrachtrup, Joerg
Issue Date
2021-08
Citation
Nature Materials, 20(8), 1079-1084
Type
Article
ISSN
1476-1122
Abstract
A plethora of single-photon emitters have been identified in the atomic layers of two-dimensional van der Waals materials1–8. Here, we report on a set of isolated optical emitters embedded in hexagonal boron nitride that exhibit optically detected magnetic resonance. The defect spins show an isotropic ge-factor of ~2 and zero-field splitting below 10 MHz. The photokinetics of one type of defect is compatible with ground-state electron-spin paramagnetism. The narrow and inhomogeneously broadened magnetic resonance spectrum differs significantly from the known spectra of in-plane defects. We determined a hyperfine coupling of ~10 MHz. Its angular dependence indicates an unpaired, out-of-plane delocalized π-orbital electron, probably originating from substitutional impurity atoms. We extracted spin–lattice relaxation times T1 of 13–17 μs with estimated spin coherence times T2 of less than 1 μs. Our results provide further insight into the structure, composition and dynamics of single optically active spin defects in hexagonal boron nitride. © 2021, The Author(s), under exclusive licence to Springer Nature Limited.
URI
http://hdl.handle.net/20.500.11750/13774
DOI
10.1038/s41563-021-00979-4
Publisher
Nature Publishing Group
Related Researcher
  • Author Kim, Youngwook Nanomaterials and Quantum Device Lab
  • Research Interests Quantum Transport, Mesoscopic Physics
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Collection:
Department of Physics and ChemistryNanomaterials and Quantum Device Lab1. Journal Articles


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