Skip to main content
eScholarship
Open Access Publications from the University of California

Persistent Charge-Density-Wave Order in Single-Layer TaSe2

  • Author(s): Ryu, H
  • Chen, Y
  • Kim, H
  • Tsai, HZ
  • Tang, S
  • Jiang, J
  • Liou, F
  • Kahn, S
  • Jia, C
  • Omrani, AA
  • Shim, JH
  • Hussain, Z
  • Shen, ZX
  • Kim, K
  • Min, BI
  • Hwang, C
  • Crommie, MF
  • Mo, SK
  • et al.
Abstract

© 2018 American Chemical Society. We present the electronic characterization of single-layer 1H-TaSe2grown by molecular beam epitaxy using a combined angle-resolved photoemission spectroscopy, scanning tunneling microscopy/spectroscopy, and density functional theory calculations. We demonstrate that 3 × 3 charge-density-wave (CDW) order persists despite distinct changes in the low energy electronic structure highlighted by the reduction in the number of bands crossing the Fermi energy and the corresponding modification of Fermi surface topology. Enhanced spin-orbit coupling and lattice distortion in the single-layer play a crucial role in the formation of CDW order. Our findings provide a deeper understanding of the nature of CDW order in the two-dimensional limit.

Main Content
Current View