Orateur
Description
Competition between electronic orders with similar energy scales can give rise to complex emergent behaviors. Detecting traces of such orders requires versatile probes, which access different aspects of the system, such as conductivity, superconductivity and magnetism. I will describe few material systems where scanning SQUID view uncovered surprising mesoscopic effects. Two polymorphs of Tantalum disulfide: a van-der Waals material, 4Hb-TaS₂, in which we found a hidden magnetic phase and a 1T polymorph, in which we probed a hidden metallic state buried in an insulator. I will also show intriguing new findings in the superconducting state of the Weyl semimetal PtBi₂. These results demonstrate the power of a local phase-sensitive view in probing quantum materials.