Imaging stress and magnetism at high pressures using a nanoscale quantum sensor
Imaging stress and magnetism at high pressures using a nanoscale quantum sensor
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DOI：
10.1126/science.aaw4352
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发表时间：
2019-12-13
期刊：
影响因子：
56.9
通讯作者：
Yao, N. Y.
中科院分区：
文献类型：
--
作者：
Hsieh, S.;Bhattacharyya, P.;Yao, N. Y.
压力会改变物质的物理、化学和电子性质。钻石砧座单元使桌面实验能够研究各种高压现象。在这里，我们介绍并使用了一种纳米级的传感平台，它将氮空位(NV)色心直接集成到钻石砧座的衬底中。我们通过对应力场和磁场随压力和温度的变化进行衍射极限成像，展示了该平台的多功能性。我们量化了所有的法向应力和剪应力分量，并演示了矢量磁场成像，从而能够测量铁中压力驱动的α-epsilon相变和Gd的复杂压力-温度相图。使用噪声光谱学的互补NV传感模式即使在没有静态磁信号的情况下也能够表征相变。
Pressure alters the physical, chemical, and electronic properties of matter. The diamond anvil cell enables tabletop experiments to investigate a diverse landscape of high-pressure phenomena. Here, we introduce and use a nanoscale sensing platform that integrates nitrogen-vacancy (NV) color centers directly into the culet of diamond anvils. We demonstrate the versatility of this platform by performing diffraction-limited imaging of both stress fields and magnetism as a function of pressure and temperature. We quantify all normal and shear stress components and demonstrate vector magnetic field imaging, enabling measurement of the pressure-driven alpha epsilon phase transition in iron and the complex pressure-temperature phase diagram of gadolinium. A complementary NV-sensing modality using noise spectroscopy enables the characterization of phase transitions even in the absence of static magnetic signatures.