Spin-orbit interaction in the electronic structure of surfaces and its detection by photoelectron spectroscopy
DIPC Seminars
- Speaker
-
Hendrik Bentmann (University of Würzburg, Germany)
- When
-
2016/07/06
14:00 - Place
- Donostia International Physics Center
- Add to calendar
- iCal
**Spin-orbit interaction in the electronic structure of surfaces
and its detection by photoelectron spectroscopy
**
Abstract:
Spin-polarized electronic states at the surfaces of materials with
strong spin-orbit interaction currently attract considerable interest
in condensed matter physics, e.g. in the context of topological insulators.
Angle-resolved photoelectron spectroscopy (ARPES) directly probes the band
dispersion of these states, and, for appropriate experimental conditions, even
allows one to address their spin properties. Here I will present recent ARPES
studies of spin-orbit coupled surface states where systematic variation of
polarization and energy of the exciting light are combined with high energy
resolution and spin-resolved photoelectron detection. I will discuss specific
examples where this experimental approach could provide insight into spin-
polarization and orbital character [1] as well as hybridization effects [2] in
the electronic structure. Furthermore, based on several experimental studies,
I will address the more general question to which extent the measured
photoelectron spin polarization is reflecting the spin properties of the
probed electronic state in the solid.
[1] H. Maaß et al., Nature Communications, 7, 11621 (2016).
[2] C. Seibel et al., Phys. Rev. Lett. 114, 066802 (2015).