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Visualizing Uniaxial-strain Manipulation of Antiferromagnetic Domains in Fe1+YTe Using a Spin-polarized Scanning Tunneling Microscope
Published on: March 24, 2019
Antiferromagnetic Correlations in Two-Dimensional Fermionic Mott-Insulating and Metallic Phases
J H Drewes1, L A Miller1,2, E Cocchi1,2
1Physikalisches Institut, University of Bonn, Wegelerstrasse 8, 53115 Bonn, Germany.
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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