Condensed Matter Seminar: Imaging phase transitions with scanning SQUID

Prof. Beena Kalinsky, Bar Ilan

18 March 2019, 11:00 
Kaplun Building, Flekser Hall 118 
Condensed Matter Seminar

Abstract:

We use a local magnetic imaging technique, scanning SQUID microscopy, to map the spatial distribution of electronic states near surfaces and interfaces. We track conductivity, superconductivity and magnetism in systems undergoing phase transitions, where the local picture is particularly meaningful. I will describe two measurements: At the superconductor-insulator transition in NbTiN we map superconducting fluctuations and detect a non-trivial behavior near the quantum critical point. Near the metal to insulator transition at the 2D LaAlO3/SrTiO3 interface, we find that the conduction landscape changes dramatically and identify the way different types of defects control the behavior.

 

 

Event Organizer: Prof. Sasha Gerber

Tel Aviv University, P.O. Box 39040, Tel Aviv 6997801, Israel
UI/UX Basch_Interactive