Epitaxial fabrication of two-dimensional TiTe2 monolayer on Au(111) substrate with Te as buffer layer

Zhipeng Song, Bao Lei, Yun Cao, Jing Qi, Hao Peng, Qin Wang, Li Huang, Hongliang Lu*, Xiao Lin, Ye Liang Wang, Shixuan Du, Hong Jun Gao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Two-dimensional (2D) materials provide a platform to exploit the novel physical properties of functional nanodevices. Here, we report on the formation of a new 2D layered material, a well-ordered monolayer TiTe2, on a Au(111) surface by molecular beam epitaxy (MBE). Low-energy electron diffraction (LEED) measurements of the samples indicate that the TiTe2 film forms (√3 × √7) superlattice with respect to the Au(111) substrate, which has three different orientations. Scanning tunneling microscopy (STM) measurements clearly show three ordered domains consistent with the LEED patterns. Density functional theory (DFT) calculations further confirm the formation of 2H-TiTe2 monolayer on the Au(111) surface with Te as buffer layer. The fabrication of this 2D layered heterostructure expands 2D material database, which may bring new physical properties for future applications.

Original languageEnglish
Article number056801
JournalChinese Physics B
Volume28
Issue number5
DOIs
Publication statusPublished - 2019

Keywords

  • TiTe
  • epitaxial fabrication
  • low-energy electron diffraction (LEED)
  • scanning tunneling microscopy (STM)
  • superlattice

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