Observation of 2D Fermionic Mott Insulators of K 40 with Single-Site Resolution
Name
PhysRevLett.116.235301.pdf
Description
Published version
Size
2.55 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Cheuk, Lawrence W
Nichols, Matthew A
Lawrence, Katherine R
Okan, Melih
Zhang, Hao
Zwierlein, Martin W
Date Issued
2016
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Citation
Cheuk, L. W., et al. "Observation of 2d Fermionic Mott Insulators of K 40 with Single-Site Resolution." Physical Review Letters 116 23 (2016).
Version
Final published version
Abstract
© 2016 American Physical Society. We report on the site-resolved observation of characteristic states of the two-dimensional repulsive Fermi-Hubbard model, using ultracold K40 atoms in an optical lattice. By varying the tunneling, interaction strength, and external confinement, we realize metallic, Mott-insulating, and band-insulating states. We directly measure the local moment, which quantifies the degree of on-site magnetization, as a function of temperature and chemical potential. Entropies per particle as low as 0.99(6)kB indicate that nearest-neighbor antiferromagnetic correlations should be detectable using spin-sensitive imaging.
MIT Department
Massachusetts Institute of Technology. Department of Physics
MIT-Harvard Center for Ultracold Atoms
Massachusetts Institute of Technology. Research Laboratory of Electronics
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DOI of Published Version
https://doi.org/10.1103/PHYSREVLETT.116.235301
