Artificial graphene with tunable interactions

Abstract

We create an artificial graphene system with tunable interactions and study the crossover from metallic to Mott insulating regimes, both in isolated and coupled two-dimensional honeycomb layers. The artificial graphene consists of a two-component spin mixture of an ultracold atomic Fermi gas loaded into a hexagonal optical lattice. For strong repulsive interactions we observe a suppression of double occupancy and measure a gapped excitation spectrum. We present a quantitative comparison between our measurements and theory, making use of a novel numerical method to obtain Wannier functions for complex lattice structures. Extending our studies to time-resolved measurements, we investigate the equilibration of the double occupancy as a function of lattice loading time.

11 pages, 10 figures

References in corpus (13)

• The electronic properties of graphene
• Ultracold atomic gases in optical lattices: mimicking condensed matter physics and beyond
• Unconventional quantum Hall effect and Berry's phase of 2pi in bilayer graphene
• Quantum spin-liquid emerging in two-dimensional correlated Dirac fermions
• Multi-Component Quantum Gases in Spin-Dependent Hexagonal Lattices
• Two-dimensional Mott-Hubbard electrons in an artificial honeycomb lattice
• BCS-BEC crossover on the two-dimensional honeycomb lattice
• Slow Mass Transport and Statistical Evolution of An Atomic Gas Across the Superfluid-Mott Insulator Transition
• Probing nearest-neighbor correlations of ultracold fermions in an optical lattice
• Dirac Point and Edge States in a Microwave Realization of Tight-Binding Graphene-like Structures
• Discerning Incompressible and Compressible Phases of Cold Atoms in Optical Lattices
• Double transfer through Dirac points in a tunable honeycomb optical lattice
• Spin correlations and doublon production rate for fermionic atoms in modulated optical lattices

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