Frédéric Chassot
(Université de Fribourg, 1700 Fribourg, Switzerland)
α-SnTe(111), a semiconducting and ferroelectric material, exhibits unique topological behavior. At room temperature, its rocksalt structure enables a metallic topological surface state. However, below a critical temperature, a structural distortion suppresses this state, leading to a macroscopic ferroelectric polarization and significant Rashba splitting. Firstly, using ARPES, we can follow the thermal evolution of the Rashba splitting as an indicator of the distortion to provide insights into the ferroelectric transition. Secondly, using time-resolved ARPES, we can also restore an ultrashort-lived topological state while the atomic structure remains distorted, photoinducing this way a topological state that coexists with a ferroelectric structure.
Frédéric Chassot
(Université de Fribourg, 1700 Fribourg, Switzerland)
Dr
Aki Pulkkinen
(New Technologies-Research Center University of West Bohemia, 30614 Pilzen, Czech Republic)
Chennan Wang
(Université de Fribourg, 1700 Fribourg, Switzerland)
Claude Monney
(University of Fribourg)
Dr
Geoffroy Kremer
(Institut Jean Lamour, CNRS-Université de Lorraine, 54011 Nancy, France)
Prof.
Gunther Springholz
(Johannes Kepler Universität, 4040 Linz, Austria)
Prof.
Hugo Dil
(EPFL; Paul Scherrer Institut, 5232 Villigen PSI, Switzerland)
Prof.
Jan Minár
(New Technologies-Research Center University of West Bohemia, 30614 Pilzen, Czech Republic)
Dr
Juraj Krempaský
(Paul Scherrer Institut, 5232 Villigen PSI, Switzerland)
There are no materials yet.
