Current and future possibilities of spin-resolved ARPES on systems with large spin-orbit interaction
Event details
| Date | 18.10.2013 |
| Hour | 14:15 |
| Speaker | Prof. Hugo Dil, Institute of Condensed Matter Physics, EPFL |
| Location | |
| Category | Conferences - Seminars |
Spin- and angle-resolved photoemission spectroscopy (SARPES) is a powerful technique to determine all the observable quantum numbers of an electron in a solid[1,2]. The possibilities and challenges of this technique will first be discussed by the example of Rashba systems. We have measured Rashba-type spin splitting on the surfaces of metals, semiconductors, and recently also on the surface of an insulator. Also we could elucidate the complex spindle torus Fermi surface of systems without bulk inversion symmetry.
Furthermore the spin texture of topological insulators will be elucidated and based on this it will be shown how SARPES can explore the subtle interplay between spin and orbital degrees of freedom. For example this results in a reversal of the measured spin polarization with light helicity on Bi2Se3. The origin of these and similar observations will be explained based on a final state interference model.
These observations pave a direct path to take SARPES to the next level, where it will be possible to explore the phase of the wave function of correlated systems. Such and other future possibilities of SARPES will be discussed in an informal way and is open to input from the audience.
References:
[1] J.H. Dil JPCM Review 21, 403001 (2009).
[2] U. Heinzmann and J.H. Dil, JPCM Review 24, 173001 (2012).
Furthermore the spin texture of topological insulators will be elucidated and based on this it will be shown how SARPES can explore the subtle interplay between spin and orbital degrees of freedom. For example this results in a reversal of the measured spin polarization with light helicity on Bi2Se3. The origin of these and similar observations will be explained based on a final state interference model.
These observations pave a direct path to take SARPES to the next level, where it will be possible to explore the phase of the wave function of correlated systems. Such and other future possibilities of SARPES will be discussed in an informal way and is open to input from the audience.
References:
[1] J.H. Dil JPCM Review 21, 403001 (2009).
[2] U. Heinzmann and J.H. Dil, JPCM Review 24, 173001 (2012).
Practical information
- Informed public
- Free
Organizer
- ICMP (Arnaud Magrez and Raphaël Butté)
Contact
- Arnaud Magrez