Gambardella leads the Magnetism and Interface Physics group at ETH D-MATL. Research directions: (1) Scanning probe magnetometry — using NV-center cantilevers (collaboration with Degen) and magneto-optical Kerr microscopy to image spin textures (skyrmions, domain walls) in thin-film heterostructures with sub-100 nm resolution; (2) Spin-orbit torques — current-induced magnetization switching via interfacial spin-orbit coupling; spin Hall and Rashba effects for spintronic devices; (3) Single-atom magnetism — STM and X-ray absorption for element-specific orbital and spin moments of individual atoms on surfaces; (4) XMCD at synchrotron — quantitative element-specific magnetic spectroscopy. Quantum sensing angle: spin-orbit driven phenomena, high-resolution magnetic imaging.

Kapitulnik combines cryogenic scanning-SQUID and Sagnac magneto-optic Kerr microscopy of unconventional and topological superconductors with high-precision torsion-balance experiments that test Newtonian gravity at short range and search for exotic spin-dependent forces, spanning table-top tests of fundamental physics and quantum materials characterization.

Moler's lab builds scanning SQUID microscopes -- magnetic-flux sensors cooled to cryogenic temperatures and scanned within microns of a sample -- to image supercurrents, vortices, and interfacial magnetism in unconventional superconductors and topological materials with sensitivity and spatial resolution that complements ensemble NV-diamond magnetometry (which reaches pT/√Hz via DEER/T1-type protocols) at a very different length and field scale.

Toeno van der Sar's group uses NV-centre diamond magnetometry to study correlated spin dynamics and electric currents in magnetic and 2D materials. Research directions: (1) scanning NV magnetometry of topological magnets, 2D magnetic materials (CrI3, Fe3GeTe2), and superconductors; (2) spin-wave (magnon) spectroscopy in magnetic thin films using NV sensors; (3) widefield NV imaging of biological samples and materials. The group develops both NV scanning probes and widefield NV ensembles for nanoscale spatial mapping of magnetic phenomena.