Journal
SCIENCE
Volume 353, Issue 6305, Pages 1260-1264Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aag3349
Keywords
-
Categories
Funding
- NSF
- Air Force Office of Scientific Research Presidential Early Career Award for Scientists and Engineers and Multidisciplinary University Research Initiative (MURI) on Exotic Quantum Phases
- Army Research Office MURI on Atomtronics
- David and Lucile Packard Foundation
- U.S. Department of Defense through the National Defense Science and Engineering Graduate Fellowship Program
- Fannie and John Hertz Foundation
- NSF Graduate Research Fellowship Program
- NSF Division of Materials Research grant [1309461]
- Simons Foundation [343227]
- Brazilian National Council for Scientific and Technological Development
- Fundacao de Amparo a Pesquisa do Estado do Rio de Janeiro
- Instituto Nacional de Ciencia e Tecnologia on Quantum Information
- U.S. Office of Naval Research
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1309461] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1125846] Funding Source: National Science Foundation
Ask authors/readers for more resources
Strong electron correlations lie at the origin of high-temperature superconductivity. Its essence is believed to be captured by the Fermi-Hubbard model of repulsively interacting fermions on a lattice. Here we report on the site-resolved observation of charge and spin correlations in the two-dimensional (2D) Fermi-Hubbard model realized with ultracold atoms. Antiferromagnetic spin correlations are maximal at half-filling and weaken monotonically upon doping. At large doping, nearest-neighbor correlations between singly charged sites are negative, revealing the formation of a correlation hole, the suppressed probability of finding two fermions near each other. As the doping is reduced, the correlations become positive, signaling strong bunching of doublons and holes, in agreement with numerical calculations. The dynamics of the doublon-hole correlations should play an important role for transport in the Fermi-Hubbard model.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available