Condensed Matter Zoom Seminar | Christian Gross, U of Tuebingen | "Microscopic spin and density cross-correlations in the Hubbard systems"

Wed, Dec 9, 2020, 1:00 pm

Quantum gas microscopes provide experimental access to novel observables, foremost, single particle resolved multi-point correlation functions. These offer a novel microscopic window into the physics of strongly correlated many-body physics. In our setup we developed a method for the simultaneous detection of spin and density, which allows us to compute their cross correlations. In one dimension this technique revealed hidden spin-charge correlations, incommensurate magnetism and dynamical spin-charge separation by tracking the spin and charge wave fronts. Here we report on recent experiments building on this technique, in which we study a two-dimensional Hubbard system for varying doping levels. We observe the formation of magnetic polarons at low doping levels, their gradual disappearance for increasing doping, eventually leading to signals expected from a fermi liquid at high doping levels.