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Title: Ultra-long coherence times amongst room-temperature solid-state spins
Authors: Herbschleb, E. D.
Kato, H.
Maruyama, Y.
Danjo, T.
Makino, T.
Yamasaki, S.
Ohki, I.
Hayashi, K.
Morishita, H.
Fujiwara, M.
Mizuochi, N.
Author's alias: Herbschleb, Ernst David
加藤, 宙光
水落, 憲和
Issue Date: 28-Aug-2019
Publisher: Springer Science and Business Media LLC
Journal title: Nature Communications
Volume: 10
Thesis number: 3766
Abstract: Solid-state single spins are promising resources for quantum sensing, quantum-information processing and quantum networks, because they are compatible with scalable quantum-device engineering. However, the extension of their coherence times proves challenging. Although enrichment of the spin-zero 12C and 28Si isotopes drastically reduces spin-bath decoherence in diamond and silicon, the solid-state environment provides deleterious interactions between the electron spin and the remaining spins of its surrounding. Here we demonstrate, contrary to widespread belief, that an impurity-doped (phosphorus) n-type single-crystal diamond realises remarkably long spin-coherence times. Single electron spins show the longest inhomogeneous spin-dephasing time (T∗2≈1.5 ms) and Hahn-echo spin-coherence time (T2 ≈ 2.4 ms) ever observed in room-temperature solid-state systems, leading to the best sensitivities. The extension of coherence times in diamond semiconductor may allow for new applications in quantum technology.
Description: 単一NVダイヤモンド量子センサで世界最高感度を実現 --合成n型ダイヤモンドにより室温での世界最長T2--. 京都大学プレスリリース. 2019-09-02.
Ultra-sensitive sensors from impure diamonds. 京都大学プレスリリース. 2019-09-26.
Rights: © The Author(s) 2019. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
DOI(Published Version): 10.1038/s41467-019-11776-8
PubMed ID: 31462631
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