Antiferromagnetic Correlations in Two-Dimensional Fermionic Mott-Insulating and Metallic Phases
Year: 2017
Type: article
Abstract: We experimentally study the emergence of antiferromagnetic correlations between ultracold fermionic atoms in a two-dimensional optical lattice with decreasing temperature. We determine the uniform magnetic susceptibility of the two-dimensional Hubbard model from simultaneous measurements of the in situ density distribution of both spin components. At half filling and strong interactions our data approach the Heisenberg model of localized spins with antiferromagnetic correlations. Moreover, we observe a fast decay of magnetic correlations when doping the system away from half filling.
Source: Physical Review Letters
Authors: J. H. Drewes, L. A. Miller, E. Cocchi, C. F. Chan, N. Wurz, M. Gall, D. Pertot, F. Brennecke, M. Köhl
Institutions: University of Bonn, University of Cambridge
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G1313477796, G5635555516, G8315171522
OpenAlex ID: W2467398241