DQMP Seminar - Dr. Mark H. Fischer - Phenomenology of unconventional orders in Kagome metals

21.11.2023 13:00 – 14:00

The family of Kagome metals AV3Sb5 with A = K, Rb, Cs has attracted a lot of attention recently for the wealth of exotic phases its members exhibit. In particular, all three members enter a charge-density-wave phase at ~100 K and below a critical temperature of ~2 K, they become superconducting. While experimental results agree on an in-plane 2x2 reconstruction due to the charge density wave, the out-of-plane wave vector and exact nature of the ordered phase, specifically whether it breaks additional point-group or time-reversal symmetries in the form of loop-currents, has yet to be determined unambiguously. In addition, very little is known about the superconducting state. After an introduction to the current experimental situation in this intriguing material family, I will discuss possible charge-density-wave phases and their interplay from a symmetry perspective. With multiple conflicting experiments and no clear microscopic understanding, a phenomenological description in the form of a Ginzburg-Landau analysis offers valuable insights. I will argue that the picture emerging in this material class is one of correlated orders at a tipping point.


Bâtiment: Ecole de Physique

Auditoire Stückelberg

Organisé par

Département de physique de la matière quantique


Mark H. Fischer, PD Dr. Condensed Matter Theory Department of Physics University of Zurich

entrée libre


Catégorie: Séminaire