Time-resolved ARPES at LACUS: Band Structure and Ultrafast Electron Dynamics of Solids

• Published in: Chimia Vol. 71; no. 5
• Main Authors: Alberto Crepaldi, Majed Chergui, Helmuth Berger, Arnaud Magrez, Philippe Bugnon, Frank van Mourik, José Ojeda, Christopher A. Arrell, Gianmarco Gatti, Silvan Roth, Marco Grioni
• Format: Journal Article
• Language: English
• Published: Swiss Chemical Society 31-05-2017
• Subjects: Angle-resolved photo emission spectroscopy (arpes); Lacus; Zrsite
• ISSN: 0009-4293; 2673-2424
• DOI: 10.2533/chimia.2017.273

The manipulation of the electronic properties of solids by light is an exciting goal, which requires knowledge of the electronic structure with energy, momentum and temporal resolution. Time- and angle-resolved photoemission spectroscopy (tr-ARPES) is the most direct probe of the effects of an optical excitation on the band structure of a material. In particular, tr-ARPES in the extreme ultraviolet (VUV) range gives access to the ultrafast dynamics over the entire Brillouin zone. VUV tr-ARPES experiments can now be performed at the ASTRA (ARPES Spectrometer for Time-Resolved Applications) end station of Harmonium, at LACUS. Its capabilities are illustrated by measurements of the ultrafast electronic response of ZrSiTe, a novel topological semimetal characterized by linearly dispersing states located at the Brillouin zone boundary.