journal article·2023-12Open access

Highly Coherent Nitrogen‐Vacancy Centers in Diamond via Rational High‐Pressure and High‐Temperature Synthesis and Treatment

Xiaoran Zhang, Kang‐Yuan Liu, Fengjiao Li, Xiaobing Liu, Shuai Duan, Jia‐Ning Wang, Gang‐Qin Liu, Xin‐Yu Pan, Xin Chen, Ping Zhang, Yanming Ma, Changfeng Chen

Advanced Functional Materials· Volume 33· Issue 52

Abstract

Abstract The high‐pressure and high‐temperature (HPHT) diamonds with well‐controlled defects and low stress offer an ideal host substrate for the fields of quantum information science; however, fabrication of quantum‐grade HPHT diamonds remains a pressing challenge. Here, a major advance in generating highly coherent nitrogen‐vacancy (NV) centers, a promising spin defect in diamonds, via tailored HPHT synthesis and postgrown annealing treatment is reported. The resulting well‐dispersed single NV− centers in type‐IIa diamonds exhibit long spin coherence times comparable to that of the reported chemical vapor deposition diamonds. Moreover, high‐density NV− ensembles in 〈100〉‐grown type‐Ib diamonds with superb zero‐phonon lines considerably sharper than those of native NV− centers in as‐grown diamonds, together with low splitting of resonances are produced. These findings demonstrate a superior synthesis and optimization protocol for creating high‐quality NV− centers avoiding lattice damage in diamond to meet the stringent requirements for a wide range of emerging quantum technologies.
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Research context

OpenAlex topics: Diamond and Carbon-based Materials Research · Metal and Thin Film Mechanics · High-pressure geophysics and materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Laboratory of High Pressure Physics and Material Science School of Physics and Physical Engineering Qufu Normal University Qufu Shandong Province 273165 China

Advanced Research Institute of Multidisciplinary Sciences Qufu Normal University Qufu Shandong Province 273165 China

Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences Beijing 100190 China

University of Chinese Academy of Sciences 100049 Beijing China

Songshan Lake Materials Laboratory Dongguan Guangdong 523808 China

Institute of Applied Physics and Computational Mathematics Beijing 71037 China

Innovation Center for Computational Methods & Software College of Physics Jilin University Changchun 130012 China

State Key Laboratory of Superhard Materials Jilin University Changchun 130012 China

International Center of Future Science Jilin University Changchun 130012 China

Department of Physics and Astronomy University of Nevada Las Vegas NV 89154 USA

Funding

Natural Science Foundation of Beijing Municipality · Chinese Academy of Sciences · Natural Science Foundation of Shandong Province · National Natural Science Foundation of China

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