Excitations of Intercalated Metal Monolayers in Transition Metal Dichalcogenides,Nano Letters

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Excitations of Intercalated Metal Monolayers in Transition Metal Dichalcogenides
Nano Letters ( IF 9.6 ) Pub Date : 2020-12-02 , DOI: 10.1021/acs.nanolett.0c03292
Shiyu Fan ₁ , Sabine Neal ₂ , Choongjae Won ₃ , Jaewook Kim _{4,

5,

6} , Deepak Sapkota ₁ , Feiting Huang _{4,

5} , Junjie Yang ₇ , David G. Mandrus _{8,

9} , Sang-Wook Cheong _{3,

4,

5} , Jason T. Haraldsen ₁₀ , Janice L. Musfeldt _{1,

2}

Affiliation

Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, United States
Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
Laboratory for Pohang Emergent Materials and Max Plank POSTECH Center for Complex Phase Materials, Pohang University of Science and Technology, Pohang 790-784, Korea
Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, United States
Rutgers Center for Emergent Materials, Rutgers University, Piscataway, New Jersey 08854, United States
Korea Atomic Energy Research Institute, Daejeon 34057, Republic of Korea
Department of Physics, New Jersey Institute of Technology, Newark, New Jersey 07102, United States
Department of Materials Science and Engineering, The University of Tennessee, Knoxville, Tennessee 37996, United States
Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
Department of Physics, University of North Florida, Jacksonville, Florida 32224, United States

We combine Raman scattering spectroscopy and lattice dynamics calculations to reveal the fundamental excitations of the intercalated metal monolayers in the Fe_xTaS₂ (x = 1/4, 1/3) family of materials. Both in- and out-of-plane modes are identified, each of which has trends that depend upon the metal–metal distance, the size of the van der Waals gap, and the metal-to-chalcogenide slab mass ratio. We test these trends against the response of similar systems, including Cr-intercalated NbS₂ and RbFe(SO₄)₂, and demonstrate that the metal monolayer excitations are both coherent and tunable. We discuss the consequences of intercalated metal monolayer excitations for material properties and developing applications.

中文翻译：

过渡金属二硫属元素化物中嵌入金属单分子层的激发

我们结合拉曼散射光谱和晶格动力学计算，揭示了Fe _x TaS ₂（x = 1/4，1/3）系列材料中插层金属单层的基本激发。平面内模式和平面外模式都可以识别，每种模式的趋势都取决于金属与金属的距离，范德华间隙的大小以及金属与硫族化物平板的质量比。针对类似系统的响应，包括Cr嵌入的NbS ₂和RbFe（SO ₄）₂，我们测试了这些趋势。，并证明金属单层激发既是相干的又是可调谐的。我们讨论了插层金属单层激发对材料性能和开发应用的影响。

更新日期：2021-01-13

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