Antiferromagnetic Correlations in Two-Dimensional Fermionic Mott-Insulating and Metallic Phases

Physical Review Letters
J H DrewesM Köhl

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.

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Citations

Oct 1, 2017·Science·Peter T BrownWaseem S Bakr
Nov 2, 2019·Science Advances·Scott SmaleJoseph H Thywissen
Sep 9, 2017·Science·Christian Gross, Immanuel Bloch
Jan 25, 2020·Physical Review Letters·M GallM Köhl
Dec 14, 2018·Nature·Guillaume SalomonChristian Gross
May 26, 2017·Nature·Anton MazurenkoMarkus Greiner
Apr 1, 2019·The Review of Scientific Instruments·A MazurenkoM Greiner
Sep 26, 2020·Physical Review Letters·Thomas HartkeMartin Zwierlein
Jul 13, 2017·Scientific Reports·F LinguaV Penna
Jan 18, 2018·Physical Review Letters·Riccardo Rossi
Jul 20, 2019·Science·Peter Schauss

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