Speaker
Maxime Rumo
Description
The material 1T-IrTe2 is a transition-metal dichalcogenide with a substantial coupling across the planes. Upon cooling, it undergoes a first-order phase transition at about 278 K from a 1 × 1 × 1 phase into a 5 × 1 × 5 phase. Here, we present a time-resolved x-ray photoemission spectroscopy (tr-XPS) and a time-resolved angle resolved photoemission spectroscopy (tr-ARPES) studies using the FLASH free electron laser combined with an optical laser. We reveal the dynamics of the first phase transition and highlight that there exists a threshold fluence above which a partial phase transition takes place. In parallel, we perform a tr-ARPES study, which allows us to support our deductions.
Authors
Maxime Rumo
Christopher Nicholson
(University of Fribourg)
Geoffroy Kremer
(Université de Fribourg)
Björn Salzmann
(Universität Fribourg)
Aki Pulkkinen
Michael Heber
Nils Wind
Markus Scholz
Federico Pressacco
Dmytro Kutnyakhov
Keyuan Ma
Guenter Brenner
Fabian von Rohr
(University of Zurich)
Claude Monney
(University of Fribourg)