Join us for the Physics Condensed Matter Seminar at 10:00 am
Title: Imaging quantum materials with scanning SQUID microscopy
Novel quantum phenomena are often driven by cooperation or competition between different electronic properties with similar energies. Probing coexisting or competing electronic orders requires versatile probes which are sensitive to the multiple aspects of the system, such as magnetism, conductivity and superconductivity. In my talk I will describe two systems where our local view uncovered surprising mesoscopic effects. In the oxide interface LaAlO3/SrTiO3, we directly imaged a filamentary current flow near the metal-insulator transition, revealing a non- universal transition [1]. In the transition metal dichalcogenide 4Hb-TaS2 we uncovered a hidden magnetic order in the normal state, through its unusual effect on the superconducting state. We ascribe this behavior to the coupling between the two building blocks of this van der Waals material, the superconducting 2H-TaS2 and the candidate spin liquid 1T-TaS2.
[1] Persky et. al. Nature Communications, 12, 3311 (2021)
https://berkeley.zoom.us/j/97545820986
Location: virtual (zoom)
Speaker: Beena Kalisky
Affiliation: Bar Ilan University