Excitations of Intercalated Metal Monolayers in Transition Metal Dichalcogenides

Shiyu Fan, Sabine Neal, Choongjae Won, Jaewook Kim, Deepak Sapkota, Feiting Huang, Junjie Yang, David G. Mandrus, Sang Wook Cheong, Jason T. Haraldsen, Janice L. Musfeldt

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)99-106
Number of pages8
JournalNano Letters
Issue number1
StatePublished - Jan 13 2021

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering


  • excitations of intercalated metal monolayers
  • intercalated transition metal dichalcogenides
  • structure-property relations involving metal monolayer excitations


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