Yan Yuting, Chen Liyuan, Dai Kai, Li Yafang, Wang Lin, Jiang Kai, Cui Anyang, Zhang Jinzhong, Hu Zhigao
Technical Center for Multifunctional Magneto-Optical Spectroscopy (Shanghai), Engineering Research Center of Nanophotonics & Advanced Instrument (Ministry of Education), Department of Physics, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China.
School of Arts and Sciences, Shanghai Dianji University, Shanghai 200240, China.
J Phys Chem Lett. 2023 Aug 31;14(34):7618-7625. doi: 10.1021/acs.jpclett.3c01784. Epub 2023 Aug 18.
Re-based transition metal dichalcogenides have attracted extensive attention owing to their anisotropic structure and excellent properties in applications such as optoelectronic devices and electrocatalysis. The present study methodically investigated the evolution of specific Raman phonon mode behaviors and phase transitions in monolayer and bulk ReSe under high pressure. Considering the distinctive anisotropic characteristics and the vibration vectors of Re and Se atoms exhibited by monolayer ReSe, we perform phonon dispersion calculations and propose a methodology utilizing pressure-dependent polarized Raman measurements to explore the precise structural evolution of monolayer ReSe under the stress fields. Varied behaviors of the -like and -like modes, along with their specific vector transformations, have been identified in the pressure range 0-14.59 GPa. The present study aims to offer original perspectives on the physical evolution of Re-based transition metal dichalcogenides, elucidating their fundamental anisotropic properties and exploring potential applicability in diverse devices.
基于Re的过渡金属二硫属化物因其各向异性结构以及在光电器件和电催化等应用中的优异性能而备受关注。本研究系统地研究了单层和块状ReSe在高压下特定拉曼声子模式行为的演变和相变。考虑到单层ReSe所展现出的独特各向异性特征以及Re和Se原子的振动矢量，我们进行了声子色散计算，并提出了一种利用压力依赖的偏振拉曼测量方法来探究单层ReSe在应力场下的精确结构演变。在0 - 14.59 GPa的压力范围内，已识别出类 和类模式的不同行为及其特定的矢量变换。本研究旨在为基于Re的过渡金属二硫属化物的物理演变提供独到见解，阐明其基本各向异性特性，并探索其在各种器件中的潜在适用性。
