Erlangen 2022 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 29: Ultra-cold atoms, ions and BEC (joint session A/Q)

A 29.17: Poster

Donnerstag, 17. März 2022, 16:30–18:30, P

Excitation Spectra of Homogeneous Ultracold Fermi Gases — •René Henke, Hauke Biss, Niclas Luick, Jonas Faltinath, Lennart Sobirey, Thomas Lompe, Markus Bohlen, and Henning Moritz — Institute of Laserphysics, University of Hamburg, Luruper Chaussee 149, Gebäude 69, 22761 Hamburg, Germany

Understanding the origins of unconventional superconductivity has been a major focus of condensed matter physics for many decades. While many questions remain unanswered, experiments have found that the systems with the highest critical temperatures tend to be layered materials where superconductivity occurs in two-dimensional (2D) structures. However, to what extent the remarkable stability of these strongly correlated 2D superfluids is related to their reduced dimensionality is still an open question. In our experiment, we use dilute gases of ultracold fermionic atoms as a model system to directly observe the influence of dimensionality on strongly interacting fermionic superfluids. This poster presents our most recent work, where we measured the superfluid gap of a strongly correlated quasi-2D Fermi gas over a wide range of interaction strengths and compares the results to recent measurements in 3D Fermi gases as well as theoretical predictions.