Poggio, Martino

Date:   Thursday, May 14, 2020
Time:   10:00
Place:   scheduled Zoom meeting
Host:    Klaus Ensslin

Imaging weak magnetic field patterns on the nanometer-scale

Martino Poggio
University of Basel

The ability to map magnetic field sensitively and on the nanometer-scale – unlike global magnetization or transport measurements – overcomes ensemble or spatial inhomogeneity in systems ranging from arrays of nanometer-scale magnets, to superconducting thin films, to strongly correlated states in van der Waals heterostructures. Local imaging of nanometer-scale magnetization, Meissner currents, or current in edge-states is the key to unraveling the microscopic mechanisms behind a wealth of new and poorly understood condensed matter phenomena.

I will discuss efforts in our group aimed at developing and applying high-sensitivity, high-resolution, non-invasive magnetic scanning probes. In particular, we have been pushing two types of sensors to their limits: mechanical sensors, based on NW cantilevers, and superconducting sensors, based on nanometer-scale superconducting quantum interference devices.