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Cheuk LW, Nichols MA, Lawrence KR, et al. Observation of 2D Fermionic Mott Insulators of ^{40}K with Single-Site Resolution. Phys Rev Lett. 2016;116(23):235301doi: 10.1103/PhysRevLett.116.235301.
Cheuk, L. W., Nichols, M. A., Lawrence, K. R., Okan, M., Zhang, H., & Zwierlein, M. W. (2016). Observation of 2D Fermionic Mott Insulators of ^{40}K with Single-Site Resolution. Physical review letters, 116(23), 235301. https://doi.org/10.1103/PhysRevLett.116.235301
Cheuk, Lawrence W, et al. "Observation of 2D Fermionic Mott Insulators of ^{40}K with Single-Site Resolution." Physical review letters vol. 116,23 (2016): 235301. doi: https://doi.org/10.1103/PhysRevLett.116.235301
Cheuk LW, Nichols MA, Lawrence KR, Okan M, Zhang H, Zwierlein MW. Observation of 2D Fermionic Mott Insulators of ^{40}K with Single-Site Resolution. Phys Rev Lett. 2016 Jun 10;116(23):235301. doi: 10.1103/PhysRevLett.116.235301. Epub 2016 Jun 10. PMID: 27341242.
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Phys Rev Lett. 2016 Jun 10;116(23):235301. doi: 10.1103/PhysRevLett.116.235301. Epub 2016 Jun 10.

Observation of 2D Fermionic Mott Insulators of ^{40}K with Single-Site Resolution.

Physical review letters

Lawrence W Cheuk, Matthew A Nichols, Katherine R Lawrence, Melih Okan, Hao Zhang, Martin W Zwierlein

Affiliations

  1. Department of Physics, MIT-Harvard Center for Ultracold Atoms, and Research Laboratory of Electronics, MIT, Cambridge, Massachusetts 02139, USA.

PMID: 27341242 DOI: 10.1103/PhysRevLett.116.235301

Abstract

We report on the site-resolved observation of characteristic states of the two-dimensional repulsive Fermi-Hubbard model, using ultracold ^{40}K 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)k_{B} indicate that nearest-neighbor antiferromagnetic correlations should be detectable using spin-sensitive imaging.

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