Flat Club - Aline Ramires

24.03.2023 12:00 – 14:00

Flattening Superconductivity: What can we learn from the surface of UTe2?
Aline Ramires (PSI)

UTe2 is a recently discovered heavy fermion superconductor. In this Flat Club, I will highlight some of the remarkable properties of this material, with a focus on scanning tunneling microscopy experiments. Differential conductance measurements at step edges have shown in gap states with different properties depending on the orientation of the step edge. In particular, particle-hole asymmetric spectra have opposite “chirality” at step edges characterized by opposite normal vectors. These experiments have led to the proposal of “chiral superconductivity” in UTe2, an idea that is not supported by the group of symmetries associated with the underlying crystalline structure. Recent experiments have also highlighted the existence of charge density waves at the surface of UTe2 with an unusual dependence on the external magnetic field. I hope to expose the experimental results in an unbiased manner and trigger discussions on the possible mechanisms behind this phenomenology.

Lieu

Bâtiment: Ecole de Physique

Auditoire Stueckelberg
Pizza: 12:00, Start discussion: 12:30

entrée libre