Spin-resolving photoelectron spectroscopy

Ultra high vacuum chamber
Ultra high vacuum chamber
Image Credit: Michaela Stahl

In our spin-resolving setup, we apply pump-probe-photoelectron spectroscopy to investigate how the electronic spin polarization reacts to the excitation by a laser pulse. Our research topics range from the spin-dependent lifetimes and scattering rates in unoccupied surface states to laser-driven phase transitions beyond thermal equilibrium. Investigations on the spin structure of topological insulators are planned and currently in preparation (for further information see: Projects/Themis).

Publications

Separating Exchange Splitting from Spin Mixing in Gadolinium by Femtosecond Laser Excitation
Beatrice Andres, Marc Christ, Cornelius Gahl, Jürgen Kirschner, Marko Wietstruk, and Martin Weinelt
Phys. Rev. Lett. 115, 207404 (2015)
DOI: 10.1103/PhysRevLett.115.207404 

Spin-Dependent Lifetimes and Exchange Splittings of Surface States on Ni(111)
Beatrice Andres, Paul Weiss, Marko Wietstruk, and Martin Weinelt,
J. Phys.: Condens. Matter 27, 015503 (2015)
DOI: 10.1088/0953-8984/27/1/015503