Êtes-vous un étudiant de l'EPFL à la recherche d'un projet de semestre?
Travaillez avec nous sur des projets en science des données et en visualisation, et déployez votre projet sous forme d'application sur Graph Search.
The charge response in barium vanadium sulfide (BaVS3) single crystals is characterized by dc resistivity and low-frequency dielectric spectroscopy. A broad relaxation mode in the megahertz range with a huge dielectric constant of approximate to 10(6) emerges at the metal-to-insulator phase transition T-MI approximate to 67 K, weakens with lowering temperature, and eventually levels off below the magnetic transition T-chi approximate to 30 K. The mean relaxation time is thermally activated in a manner similar to the dc resistivity. These features are interpreted as signatures of the collective charge excitations characteristic for the orbital ordering that gradually develops below T-MI and stabilizes at long-range scale below T-chi.
Holger Frauenrath, Yauhen Sheima
Anne-Florence Raphaëlle Bitbol
Mihai Adrian Ionescu, Igor Stolichnov, Ali Saeidi, Teodor Rosca, Sadegh Kamaei Bahmaei, Eamon Patrick O'Connor, Matteo Cavalieri, Carlotta Gastaldi