Coherent electronic band structure of TiTe2/ TiSe2 moire bilayer

T. C. Chiang, Mei Yin Chou, Meng Kai Lin, Tao He, Joseph A. Hlevyack, Peng Chen, Sung Kwan Mo

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

A van der Waals bonded moirebilayer formed by sequential growth of TiSe2 and TiTe2 monolayers exhibits emergent electronic structure as evidenced by angle-resolved photoemission band mapping. The two monolayers adopt the same lattice orientation but incommensurate lattice constants. Despite the lack of translational symmetry, sharp dispersive bands are observed. The dispersion relations appear distinct from those for the component monolayers alone. Theoretical calculations illustrate the formation of composite bands by coherent electronic coupling despite the weak interlayer bonding, which leads to band renormalization and energy shifts.

Original languageEnglish
Pages (from-to)3359-3364
Number of pages6
JournalACS Nano
Volume15
Issue number2
DOIs
StatePublished - 23 Feb 2021

Keywords

  • Emergent band structure
  • Heterostructure
  • Moire bilayer
  • Transition metal dichalcogenides
  • Ultrathin film

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