Excitations of Intercalated Metal Monolayers in Transition Metal Dichalcogenides

We combine Raman scattering spectroscopy and lattice dynamics calculations to reveal the fundamental excitations of the intercalated metal monolayers in the FexTaS2 (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...

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Bibliographic Details
Published in:Nano letters 2020-12, Vol.21 (1)
Main Authors: Fan, Shiyu, Neal, Sabine, Won, Choongjae, Kim, Jaewook, Sapkota, Deepak, Huang, Feiting, Yang, Junjie, Mandrus, David G., Cheong, Sang-Wook, Haraldsen, Jason T., Musfeldt, Janice L.
Format: Article
Language:English
Subjects:
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
embedded metal monolayer
excitations of intercalated metal monolayers
intercalated chalcogenides
intercalated chalcogenides, confined metal monolayers, phonons
intercalated transition metal dichalcogenides
structure−property relations involving metal monolayer excitations
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Summary:We combine Raman scattering spectroscopy and lattice dynamics calculations to reveal the fundamental excitations of the intercalated metal monolayers in the FexTaS2 (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. Here, we discuss the consequences of intercalated metal monolayer excitations for material properties and developing applications.
ISSN:1530-6984
1530-6992