Excitations of Intercalated Metal Monolayers in Transition Metal Dichalcogenides

Authors

Shiyu Fan, The University of Tennessee, Knoxville
Sabine Neal, The University of Tennessee, Knoxville
Choongjae Won, Pohang University of Science and Technology
Jaewook Kim, Rutgers University–New Brunswick
Deepak Sapkota, The University of Tennessee, Knoxville
Feiting Huang, Rutgers University–New Brunswick
Junjie Yang, New Jersey Institute of Technology
David G. Mandrus, The University of Tennessee, Knoxville
Sang Wook Cheong, Pohang University of Science and Technology
Jason T. Haraldsen, University of North FloridaFollow
Janice L. Musfeldt, The University of Tennessee, Knoxville

Document Type

Article

Publication Date

1-13-2021

Abstract

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. We discuss the consequences of intercalated metal monolayer excitations for material properties and developing applications.

Publication Title

Nano Letters

Volume

21

Issue

1

First Page

99

Last Page

106

Digital Object Identifier (DOI)

10.1021/acs.nanolett.0c03292

ISSN

15306984

E-ISSN

15306992

Citation Information

Fan, S., Neal, S., Won, C., Kim, J., Sapkota, D., Huang, F., Yang, J., Mandrus, D. G., Cheong, S. W., Haraldsen, J. T., & Musfeldt, J. L. (2021). Excitations of Intercalated Metal Monolayers in Transition Metal Dichalcogenides. Nano letters, 21(1), 99–106. https://doi.org/10.1021/acs.nanolett.0c03292