Dresden 2020 – wissenschaftliches Programm
Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 59: Posters Magnetism III
MA 59.32: Poster
Freitag, 20. März 2020, 09:00–12:00, P2/EG
Static and dynamic magnetic properties of (MnBi2Te4)(Bi2Te3)n probed using electron spin resonance technique. — •Alexey Alfonsov1, Kavita Mehlawat1, Anna Isaeva1,2, Alexander Zeugner3, Anja U. B. Wolter1, Vladislav Kataev1, and Bernd Büchner1,2 — 1Leibniz Institute for Solid State and Materials Research IFW Dresden, 01069 Dresden, Germany — 2Faculty of Physics, TU Dresden, 01062 Dresden, Germany — 3Faculty of Chemistry and Food Chemistry, TU Dresden, 01062 Dresden, Germany
(MnBi2Te4)(Bi2Te3)n represents a family of van der Waals materials which exhibit a coexistence of topologically nontrivial surface states with intrinsic magnetism. Such unusual combination of properties renders this natural heterostructures very attractive for investigations since it enables a number of exotic phenomena, which in turn might find potential applications in spintronics. In this work we address static and dynamic magnetic properties of the title material in ordered and disordered states using multifrequency and high field electron spin resonance technique. One example of our finding is the observation in MnBi2Te4 of surprisingly anisotropic spin dynamics of bulk conduction electrons and Mn localized states which, as we argue, could be responsible for the persistence of the band gap in the topological surface state even above the magnetic ordering temperature.