Interplay of crystal thickness and in-plane anisotropy and evolution of quasi-one dimensional electronic character in ReSe2

Lewis Hart, Surani Gunasekera, Marcin Mucha-Kruczynski, James Webb, Jose Avila, Maria-Carmen Asensio, Daniel Wolverson

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Abstract

We study the valence band structure of ReSe2 crystals with varying thickness down to a single layer using nanoscale angle-resolved photoemission spectroscopy and density functional theory. The width of the top valence band in the direction perpendicular to the rhenium chains decreases with decreasing number of layers, from ~200 meV for the bulk to ~80 meV for monolayer. This demonstrates increase of in-plane anisotropy induced by changes in the interlayer coupling and suggests progressively more one-dimensional character of electronic states in few-layer rhenium dichalcogenides.
Original languageEnglish
Article number035421
JournalPhysical Review B : Condensed Matter and Materials Physics
Volume104
DOIs
Publication statusPublished - 15 Jul 2021

Keywords

  • ARPES
  • ReSe2
  • 2D materials

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

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