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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.
In: Physical Review B, 2004, 69 (4)
doi: 10.26083/tuprints-00021100
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Item Type: Article
Type of entry: Secondary publication
Title: Band symmetries of GaSe(0001) studied by spin-resolved electron spectroscopy using circularly polarized radiation
Language: English
Date: 2022
Place of Publication: Darmstadt
Year of primary publication: 2004
Publisher: American Physical Society
Journal or Publication Title: Physical Review B
Volume of the journal: 69
Issue Number: 4
Collation: 7 Seiten
DOI: 10.26083/tuprints-00021100
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Origin: Secondary publication service
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.

Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-211001
Classification DDC: 500 Science and mathematics > 530 Physics
600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Surface Science
Date Deposited: 19 Apr 2022 13:33
Last Modified: 06 Feb 2023 08:40
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/21100
PPN: 504323725
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