title: The symmetry-resolved electronic structure of 2H-WSe2(0 0 0 1).
abstract: The orbital symmetry of the band structure of 2H-WSe2(0 0 0 1) has been investigated by means of angle-resolved photoelectron spectroscopy (ARPES) and density functional theory (DFT). The WSe2(0 0 0 1) experimental band structure is found, by ARPES, to be significantly different for states of even and odd reflection parities along both the [Formula: see text]-[Formula: see text] and [Formula: see text]-[Formula: see text] lines, in good agreement with results obtained from DFT. The light polarization dependence of the photoemission intensities from the top of the valence band for bulk WSe2(0 0 0 1) is explained by the dominance of W 5[Formula: see text] states around the [Formula: see text]-point and W 5d xy states around the [Formula: see text]-point, thus dominated, respectively, by states of even and odd symmetry, with respect to the [Formula: see text]-[Formula: see text] line. The splitting of the topmost valence band at [Formula: see text], due to spin-orbit coupling, is measured to be 0.49  ±  0.01 eV, in agreement with the 0.48 eV value from DFT, and prior measurements for the bulk single crystal WSe2(0 0 0 1), albeit slightly smaller than the 0.513  ±  0.01 eV observed for monolayer WSe2.
authors.affiliation: Department of Physics and Astronomy, Theodore Jorgensen Hall, 855 N 16th, University of Nebraska, Lincoln, NE 68588-0299, USA.
authors.forename: Iori
authors.initials: I
authors.lastname: Tanabe
authors.forename: Takashi
authors.initials: T
authors.lastname: Komesu
authors.forename: Duy
authors.initials: D
authors.lastname: Le
authors.forename: Takat B
authors.initials: TB
authors.lastname: Rawal
authors.forename: Eike F
authors.initials: EF
authors.lastname: Schwier
authors.forename: Mingtian
authors.initials: M
authors.lastname: Zheng
authors.forename: Yohei
authors.initials: Y
authors.lastname: Kojima
authors.forename: Hideaki
authors.initials: H
authors.lastname: Iwasawa
authors.forename: Kenya
authors.initials: K
authors.lastname: Shimada
authors.forename: Talat S
authors.initials: TS
authors.lastname: Rahman
authors.forename: Peter A
authors.initials: PA
authors.lastname: Dowben