Coherence enhancement via a diamond-graphene hybrid for nanoscale quantum sensing
Quantum coherence serves as a crucial quantum resource for achieving high-sensitivity quantum sensing. Because of its long coherence time at room temperature, the nitrogen-vacancy (NV) center has emerged as a quantum sensor in various fields in recent years. While nanoscale quantum sensing at room temperature has been demonstrated for NV centers, noise on the diamond surface severely limits its further development at a higher sensitivity. Here, we utilize the hybridization between graphene and diamond surfaces to directly deplete surface unpaired electron spins, thereby achieving roughly two-fold enhancement in coherence. Through the combination of electron spin resonance spectra and first-principle calculations, we explain that this phenomenon arises from a significant reduction in electron spin density on the diamond surface due to interface electron orbital hybridization. Our research presents a new approach for solid-state quantum sensors to reach the desired sensitivity level and offers a new pathway for future studies on material interfaces.
Authors
- Yucheng Hao (ORCID: https://orcid.org/0000-0001-5281-1751)
- Pei Yu (ORCID: https://orcid.org/0000-0002-7884-3214)
- Shaoyi Xu (ORCID: https://orcid.org/0000-0002-8672-2471)
- Wenna Tang
- Jian‐Hua Jiang (ORCID: https://orcid.org/0000-0001-6505-0998)
- Libo Gao (ORCID: https://orcid.org/0000-0002-7822-9812)
- Fazhan Shi
- Tianyu Xie (ORCID: https://orcid.org/0000-0002-2563-2974)
- Xiangyu Ye (ORCID: https://orcid.org/0000-0002-8309-2101)
- Ya Wang (ORCID: https://orcid.org/0000-0001-6232-7234)
- Zeyu Li (ORCID: https://orcid.org/0000-0001-5112-137X)
- Zhiping Yang (ORCID: https://orcid.org/0000-0002-5008-0219)
- Jiangfeng Du (ORCID: https://orcid.org/0000-0001-8085-8012)
- Pengfei Wang (ORCID: https://orcid.org/0000-0002-6384-2358)
- Zhenhua Qiao (ORCID: https://orcid.org/0000-0002-7195-8561)
- Xi Kong (ORCID: https://orcid.org/0009-0008-6993-3251)
Institutions
- University of Science and Technology of China (CN)
- Suzhou University of Science and Technology (CN)
- Soochow University (CN)
- Collaborative Innovation Center of Advanced Microstructures (CN)
- Zhejiang University (CN)
- Nanjing University (CN)
Publication Details
- Journal
- National Science Review
- Published
- 2025-03-08
- DOI
- https://doi.org/10.1093/nsr/nwaf076
- Citations
- 8
- Primary Topic
- Diamond and Carbon-based Materials Research
- Type
- article
- Field-Weighted Citation Impact
- 4.14
Funders
- National Natural Science Foundation of China
- Chinese Academy of Sciences
- National Key Research and Development Program of China
- Fundamental Research Funds for the Central Universities