Ab stract:
More than one decade the material class of Fe-bas ed superconductors has provided a fruitful platform for the investigation of the interplay between charge\, spin and orbital degrees of freedom. Ele ctronic properties governed by the Fe 3d states manifest themselves in a r ich electronic phase diagram and electronic correlations\, which are tunab le across the different Fe-pnictide and Fe-chalcogenide compounds. Latter have attracted wide attention with high-temperature superconductivity in 1 uc FeSe/SrTiO3 platforms as well as with predictions of topological phase s (band inversions) in FeSe and FeSe1-xTex. Topological materials can be c lassified by symmetries\, and due to an intensified research\,many differe nt compounds (semiconductors\, complex oxides\, iridates\, 2D layered stru ctures\, etc.) and hybrid structures with large spin-orbit coupling were i dentified for showing topologically protected surface (edge) states and re alizing Dirac (Weyl)-like dispersions as well as Berry phase physics in co ndensed matter. Displayed anomalous electrical transport and magnetic prop erties include an anomalous metal behavior in superconductor-to-insulator transitions due to potential bosonic topological insulators in 2D electron ic systems\, unconventional and topological superconductivity\, localizati on effects\, quantum anomalous Hall effect or Nernst effect\, etc. Interes ting questions address the role of disorder\, transitions between differen t (topological) phases and the electrical response upon the irradiation wi th light.In my talk I will cover selected previous work on Fe-based superc onductors and point out possible future topics on topological and complex materials that contribute to ct.qmatcenter activities.
Where: Zoom Meeting:
https://tu-dresden.zoom.us/j/85193786651?pwd=Q0V0KzR2ems
yRnhvdzdLRDdTSnBaZz09 (https://tu-dresden.zoom.us/j/85193786651?pwd=Q0V0Kz
R2emsyRnhvdzdLRDdTSnBaZz09)
Meeting ID: 851 9378 6651
Passcode
: reG3NboG#N