金刚石对顶砧（DAC）超高压技术自诞生以来，已在物质超导特性研究中获得了举世瞩目的成就。然而，随着新型超导材料的不断涌现以及研究压力越来越高，现有DAC高压超导研究方法已经来到了发展的瓶颈阶段。百万大气压以上条件下，传统的电阻测量和基于磁感应线圈的迈斯纳效应测量，将会遇到电极与样品发生高压化合反应，或因抗磁性信号太弱而无法测量迈斯纳效应等难以克服的技术问题。本项目拟利用金刚石NV色心在探测单电子自旋态变化时具有极高灵敏度的优势，开展DAC上高精度和能够空间分辨的物质超导抗磁性的测量方法研究。解决传统迈斯纳效应测量方法不能研究单个金属纳米团簇超导态以及高压超导中的非静水压效应等问题。通过测量NV色心的电子自旋共振峰随压力和温度的函数依赖关系，建立高压迈斯纳效应测量的新方法和新规范，成为摆脱现有测量技术束缚的突破口，对未来高压超导现象研究乃至整个高压物理学的其他研究产生重要的推动作用。

Diamond anvil cell (DAC) based high-pressure technology has gained significant achievements in superconducting property studies. However, with the continuous emergence of new type superconductors and more and more higher pressure, existing methods for high-pressure superconducting study have encountered a bottleneck. Under high pressure over 100 GPa, traditional resistance measurement and magnetic-susceptibility based Meissner effect measurement would face some technical problems which are hard to solve, such as high-pressure combination reactions between electrodes and sample, and undetectable Meissner effect resulting from tiny samples and weak diamagnetism signals. The project will use the ultrahigh sensitivity of diamond NV centers for detecting the change of single electronic spin, study the method of high-sensitivity and spatial-resolution superconducting diamagnetism measurement in DAC, and solve the problem that the superconducting states of single metallic nano clusters cannot be measured by traditional methods and the problem of non-hydrostatic effect in high-pressure superconducting studies. By measuring the function relationship between the electronic spin resonance of diamond NV center and the pressure and temperature, new method and standard for Meissner effect measurement under high pressure will be built, which will become a breakthrough for getting rid of the bound of existing technology, and improve the development of future high-pressure superconducting studies and even other aspects of high pressure science.