TU Darmstadt / ULB / TUprints

Band symmetries of GaSe(0001) studied by spin-resolved electron spectroscopy using circularly polarized radiation

Yu, S. -W. ; Müller, N. ; Heinzmann, U. ; Pettenkofer, C. ; Klein, Andreas ; Blaha, P. (2022):
Band symmetries of GaSe(0001) studied by spin-resolved electron spectroscopy using circularly polarized radiation. (Publisher's Version)
In: Physical Review B, 69 (4), American Physical Society, ISSN 2469-9950, e-ISSN 2469-9969,
DOI: 10.26083/tuprints-00021100,
[Article]

[img] Text
PhysRevB.69.045320.pdf
Available under: only the rights of use according to UrhG.

Download (500kB)
Item Type: Article
Origin: Secondary publication service
Status: Publisher's Version
Title: Band symmetries of GaSe(0001) studied by spin-resolved electron spectroscopy using circularly polarized radiation
Language: English
Abstract:

We have studied the symmetry properties of the bands of the layered semiconductor GaSe along the Δ direction by means of spin-resolved electron spectroscopy using circularly polarized synchrotron radiation and by means of a relativistic LAPW band-structure calculation. The photoelectron spectra show in the main a pair of weakly dispersing peaks caused by direct transitions from valence-band states with symmetries Δ59, Δ69 and Δ57, Δ68. Our data determine the spin-orbit splitting of these valence bands to be ΔEso=0.3±0.1eV. We find a gap in the unoccupied bands along Δ about 8 eV above the fundamental gap. The analysis of the photoelectron spin polarization reveals that also unoccupied states with low symmetries Δ57, Δ68 and Δ59, Δ69 are involved in excitation and emission. Spin resolved spectra measured at Auger electrons following the decay of Ga 3d core holes confirm that p derived unoccupied states exists below the vacuum level.

Journal or Publication Title: Physical Review B
Volume of the journal: 69
Issue Number: 4
Publisher: American Physical Society
Collation: 7 Seiten
Classification DDC: 500 Naturwissenschaften und Mathematik > 530 Physik
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Surface Science
Date Deposited: 19 Apr 2022 13:33
Last Modified: 19 Apr 2022 13:34
DOI: 10.26083/tuprints-00021100
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-211001
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/21100
PPN:
Export:
Actions (login required)
View Item View Item