Rostock 2019 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 12: Ultra-cold atoms, ions and BEC
A 12.19: Poster
Dienstag, 12. März 2019, 16:30–18:30, S Fobau Physik
Magnetic Polarons and Spin-Charge Separation in Fermi-Hubbard Systems — •Sarah Hirthe1, Jayadev Vijayan1, Joannis Koepsell1, Pimonpan Sompet1, Guillaume Salomon1, Dominik Bourgund1, Immanuel Bloch1,2, and Christian Gross1 — 1Max Planck Institute of Quantum Optics, Garching — 2Ludwig-Maximilians-Universität München
Ultracold fermions in optical lattices have emerged as a powerful tool in the quantum simulation of the Fermi-Hubbard model. With access to full density and spin resolution, our quantum gas microscope has enabled the study of the interplay between spin and charge in doped antiferromagnets. In 1D, the phenomena of spin-charge separation decouples the spin and charge degrees of freedom, creating holons and spinons. We probe this phenomena by locally quenching an antiferromagnet to form holons and spinons and dynamically observing their propagation. In 2D, the competition between the spin and charge degrees of freedom leads to the formation of a polaron. We identify the formation of such a polaron by looking at the dressed spins around a dopant.