Bian Ke, Zheng Wentian, Zeng Xianzhe, Chen Xiakun, Stöhr Rainer, Denisenko Andrej, Yang Sen, Wrachtrup Jörg, Jiang Ying
International Center for Quantum Materials, School of Physics, Peking University, Beijing, China.
3rd Institute of Physics, University of Stuttgart and Institute for Quantum Science and Technology (IQST), Stuttgart, Germany.
Nat Commun. 2021 Apr 28;12(1):2457. doi: 10.1038/s41467-021-22709-9.
Nitrogen-vacancy (NV) centers in diamond can be used as quantum sensors to image the magnetic field with nanoscale resolution. However, nanoscale electric-field mapping has not been achieved so far because of the relatively weak coupling strength between NV and electric field. Here, using individual shallow NVs, we quantitatively image electric field contours from a sharp tip of a qPlus-based atomic force microscope (AFM), and achieve a spatial resolution of ~10 nm. Through such local electric fields, we demonstrated electric control of NV's charge state with sub-5 nm precision. This work represents the first step towards nanoscale scanning electrometry based on a single quantum sensor and may open up the possibility of quantitatively mapping local charge, electric polarization, and dielectric response in a broad spectrum of functional materials at nanoscale.
金刚石中的氮空位（NV）中心可作为量子传感器，以纳米级分辨率对磁场进行成像。然而，由于NV与电场之间的耦合强度相对较弱，迄今为止尚未实现纳米级电场测绘。在此，我们利用单个浅NV，对基于qPlus的原子力显微镜（AFM）尖锐探针的电场轮廓进行了定量成像，并实现了约10纳米的空间分辨率。通过这种局部电场，我们展示了对NV电荷态的电控制，精度可达亚5纳米。这项工作代表了基于单个量子传感器的纳米级扫描电测技术的第一步，并可能为在纳米尺度上对各种功能材料中的局部电荷、电极化和介电响应进行定量测绘开辟可能性。
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