Berlin 2024 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 84: Electronic Structure of Surfaces I: Spectroscopy, Surface States
O 84.5: Vortrag
Donnerstag, 21. März 2024, 11:30–11:45, MA 144
Spin Texture in Honeycomb Monolayers AgTe/Ag(111) and CuTe/Cu(111) — •Begmuhammet Geldiyev1, Maximilian Ünzelmann1, Philipp Kagerer1, Jakub Schusser1, Hendrik Bentmann2, and Friedrich Reinert1 — 1Experimentelle Physik 7 and Würzburg-Dresden Cluster of Excellence ct.qmat, Universität Würzburg — 2Center for Quantum Spintronics, Department of Physics, NTNU, Norway
In this contribution we will investigate the spin texture of honeycomb monolayers CuTe and AgTe [1] grown on Cu(111) and Ag(111), respectively. In case of both materials, our spin-resolved ARPES measurements suggest the existence of Rashba-like spin texture, which originates from the broken inversion symmetry at the surface. Moreover, we here for the first time observe the Rashba-like spin splitting in CuTe/Cu(111). Prior, it could not be seen in spin-integrated ARPES and we deduce a value of 0.25 ± 0.05 eV Å for the Rashba constant. It is approximately a factor of 4 smaller compared to the case of AgTe, almost equal to the relative factor between Rashba constants of Cu2Bi and Ag2Bi alloys [2]. In addition, we elaborate on the formation of out-of-plane spin polarization which can be induced by the underlying honeycomb lattice structure.
[1] M. Ünzelmann et al., Phys. Rev. Lett. 124, 176401 (2020)
[2] H. Bentmann et al., EPL 87, 37003 (2009)
Keywords: honeycomb monolayer; spin texture; spin-resolved ARPES