TY - JOUR
T1 - Observation of 2D Fermionic Mott Insulators of K 40 with Single-Site Resolution
AU - Cheuk, Lawrence W.
AU - Nichols, Matthew A.
AU - Lawrence, Katherine R.
AU - Okan, Melih
AU - Zhang, Hao
AU - Zwierlein, Martin W.
N1 - Publisher Copyright:
© 2016 American Physical Society.
PY - 2016/6/10
Y1 - 2016/6/10
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84974654773&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84974654773&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.116.235301
DO - 10.1103/PhysRevLett.116.235301
M3 - Article
C2 - 27341242
AN - SCOPUS:84974654773
SN - 0031-9007
VL - 116
JO - Physical review letters
JF - Physical review letters
IS - 23
M1 - 235301
ER -