Mrs
Marie-Laure Mottas
(Département de Physique and Fribourg Center for Nanomaterials, Université de Fribourg, CH-1700 Fribourg, Switzerland)
The transition-metal dichalcogenide TiSe$_2$ is a layered material with a charge density wave (CDW) transition temperature around 200 K. Its origin is still a matter of debate. Using angle-resolved photoemission spectroscopy (ARPES) and scanning tunneling microscopy and spectroscopy (STM/STS), the influence of sulfur concentration in TiSe$_{2-x}$S$_x$ is studied. While TiS$_2$ does not show a CDW phase, the CDW in TiSe$_{2-x}$S$_x$ is not strongly perturbed. With ARPES, we study the evolution of band dispersion and CDW gap size as a function of temperature and sulfur concentration. STM and STS monitor the long-range coherence of the CDW as a function of sulfur substitutions. These observations allow enhancing our understanding of CDW formation.
Mrs
Marie-Laure Mottas
(Département de Physique and Fribourg Center for Nanomaterials, Université de Fribourg, CH-1700 Fribourg, Switzerland)
Mr
Baptiste Hildebrand
(Département de Physique and Fribourg Center for Nanomaterials, Université de Fribourg, CH-1700 Fribourg, Switzerland)
Dr
Thomas Jaouen
(Département de Physique and Fribourg Center for Nanomaterials, Université de Fribourg, CH-1700 Fribourg, Switzerland)
Dr
Elia Razzoli
(Department of Physics and Astronomy, University of British Columbia, Vancouver, BC, Canada)
Mr
Gael Monney
(Département de Physique and Fribourg Center for Nanomaterials, Université de Fribourg, CH-1700 Fribourg, Switzerland)
Dr
Helmuth Berger
(Institut de Génie Atomique, EPFL, CH-1015 Lausanne, Switzerland)
Dr
Enrico Giannini
(Département of Quantum Matter Physics, University of Geneva, 1211 Geneva 4, Switzerland)
Dr
Céline Barreteau
(Département of Quantum Matter Physics, University of Geneva, 1211 Geneva 4, Switzerland)
Prof.
Philipp Aebi
(Département de Physique and Fribourg Center for Nanomaterials, Université de Fribourg, CH-1700 Fribourg, Switzerland)
