Regensburg 2022 – scientific programme
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O: Fachverband Oberflächenphysik
O 73: Electronic Structure of Surfaces 1
O 73.6: Talk
Thursday, September 8, 2022, 16:15–16:30, S053
ARPES studies of Hf(0001) monocrystal: experiment and theory — •Saleem Ayaz Khan1, Laurent Nicolai1, Jean Zaraket2,3, Maria Christine Richter2,3, Olivier Heckmann2,3, Laxman Nagi Reddy2,3, Waly Ndiaye2,3, Mauro Fanciulli2,3, Karol Hricovini2,3, and Jan Minar1 — 1NTC, Univiversity of West Bohemia, Plzeň, Czech Republic — 2LPMS, CY Cergy Paris University, France — 3DRF, IRAMIS, LIDYL, CEA Saclay, France
We present first ARPES studies of the electronic structure of the Hf(0001) surface. High-Z materials have attracted much interest, because the strong spin-orbit coupling in combination with the broken inversion symmetry and an important effective electric field at the surface results in a spin-momentum locking. Spin-polarized electrons at the surface are of interest in physics and novel applications in electronics and data processing. Extra sharp peaks observed in experiment are identified thanks to ab-initio calculations performed within the SPR-KKR package. These extra states come from oxygen contamination of the highly reactive surface of Hf(0001). Further comparison is done on the ARPES level, thanks to the one-step model which include all matrix elements effect, resulting in an excellent agreement.