Dimensional crossover tuned by pressure in layered magnetic NiPS3
Dimensional crossover tuned by pressure in layered magnetic NiPS3
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通过层状磁性 NiPS3 中的压力调节维度交叉
DOI：
10.1007/s11433-021-1727-6
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发表时间：
2020-09
期刊：
影响因子：
--
通讯作者：
Xiaohui Yu
中科院分区：
文献类型：
--
作者：
Xiaoli Ma;Yimeng Wang;Yunyu Yin;Binbin Yue;Jianhong Dai;Jinguang Cheng;Jianting Ji;Feng Jin;Fang Hong;Jian-Tao Wang;Qingming Zhang;Xiaohui Yu
大多数二维材料的物理性质高度依赖于其层间相互作用的性质。对层间相互作用的深入研究有助于理解二维材料的物理性质，并有助于相关器件的开发。层状磁性nip3具有独特的磁性和电子性能。nips3的电子能带结构和相应的磁态对层间相互作用很敏感，可以通过外部压力来调节。在这里，我们报道了在静水压力诱导的2D-3D结构交叉过程中，绝缘体-金属转变伴随着磁序的崩溃。从单斜晶格（C2/m）到三角晶格的两阶段相变通过初始模拟确定，并通过高压x射线衍射和拉曼散射证实；这种转变对应于沿轴逐层滑动机制。温度相关电阻测量和不同压力下的室温红外光谱表明，绝缘体-金属转变和磁序崩溃发生在~ 20 GPa，这是由低温拉曼散射测量和理论计算证实的。这些结果建立了结构变化、电输运和磁相变之间的强相关性，并扩展了我们对层状磁性材料的理解。此外，层间位移引起的结构转变对环境压力下类似装置的设计具有重要意义。
The physical properties of most 2D materials are highly dependent on the nature of their interlayer interaction. In-depth studies of the interlayer interaction are beneficial to the understanding of the physical properties of 2D materials and permit the development of related devices. Layered magnetic NiPS3has unique magnetic and electronic properties. The electronic band structure and corresponding magnetic state of NiPS3are expected to be sensitive to the interlayer interaction, which can be tuned by external pressure. Here, we report an insulator-metal transition accompanied by the collapse of magnetic order during the 2D-3D structural crossover induced by hydrostatic pressure. A two-stage phase transition from a monoclinic (C2/m) to a trigonallattice is identified viaab initiosimulations and confirmed via high-pressure X-ray diffraction and Raman scattering; this transition corresponds to a layer-by-layer slip mechanism along thea-axis. Temperature-dependent resistance measurements and room temperature infrared spectroscopy under different pressures demonstrate that the insulator-metal transition and the collapse of the magnetic order occur at ∼20 GPa, which is confirmed by low-temperature Raman scattering measurements and theoretical calculations. These results establish a strong correlation between the structural change, electric transport, and magnetic phase transition and expand our understanding of layered magnetic materials. Moreover, the structural transition caused by the interlayer displacement has significance for designing similar devices at ambient pressure.
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影响因子：
3.7
作者：
Wildes, A. R.;Ronnow, H. M.;Godfrey, K. W.
通讯作者：
Godfrey, K. W.
影响因子：
3
作者：
Evarestov, Robert A.;Kuzmin, Alexei
通讯作者：
Kuzmin, Alexei
影响因子：
3.7
作者：
Lancon, D.;Walker, H. C.;Wildes, A. R.
通讯作者：
Wildes, A. R.
影响因子：
3.7
作者：
Kresse, G;Furthmuller, J
通讯作者：
Furthmuller, J
影响因子：
17.1
作者：
Du, Ke-zhao;Wang, Xing-zhi;Kloc, Christian
通讯作者：
Kloc, Christian