Local Compressibility Measurements of Correlated States in Suspended Bilayer Graphene
arXiv:1009.2069 · doi:10.1103/PhysRevLett.105.256806
Abstract
Bilayer graphene has attracted considerable interest due to the important role played by many-body effects, particularly at low energies. Here we report local compressibility measurements of a suspended graphene bilayer. We find that the energy gaps at filling factors v = 4 do not vanish at low fields, but instead merge into an incompressible region near the charge neutrality point at zero electric and magnetic field. These results indicate the existence of a zero-field ordered state and are consistent with the formation of either an anomalous quantum Hall state or a nematic phase with broken rotational symmetry. At higher fields, we measure the intrinsic energy gaps of broken-symmetry states at v = 0, 1 and 2, and find that they scale linearly with magnetic field, yet another manifestation of the strong Coulomb interactions in bilayer graphene.
9 pages, including 4 figures and supplementary materials
References in corpus (20)
- The electronic properties of graphene
- Boron nitride substrates for high-quality graphene electronics
- Giant Intrinsic Carrier Mobilities in Graphene and Its Bilayer
- Biased bilayer graphene: semiconductor with a gap tunable by electric field effect
- Unconventional quantum Hall effect and Berry's phase of 2pi in bilayer graphene
- Gate-induced insulating state in bilayer graphene devices
- Asymmetry gap in the electronic band structure of bilayer graphene
- Topological Mott Insulators
- Pseudospin Magnetism in Graphene
- Quantum Anomalous Hall State in Bilayer Graphene
- Cyclotron resonance in bilayer graphene
- Quantum-Hall activation gaps in graphene
- Intra-Landau level Cyclotron Resonance in Bilayer Graphene
- Measurement of the electronic compressibility of bilayer graphene
- Zero-energy states in corrugated bilayer graphene
- Intrinsic Zeeman Effect in Graphene
- Dynamics and phase diagram of the quantum Hall state in bilayer graphene
- Pedestrian index theorem a la Aharonov-Casher for bulk threshold modes in corrugated multilayer graphene
- Electronic compressibility of a graphene bilayer
- Compressibility of bilayer graphene
Cited by in corpus (55)
- The electronic properties of bilayer graphene
- Fractional Chern insulators in magic-angle twisted bilayer graphene
- Lattice Theory of Pseudospin Ferromagnetism in Bilayer Graphene: Competing Orders and Interaction Induced Quantum Hall States
- Minimum Conductivity and Evidence for Phase Transitions in Ultra-clean Bilayer Graphene
- Strained bilayer graphene: Band structure topology and Landau level spectrum
- Tunable Layer Circular Photogalvanic Effect in Twisted Bilayers
- Electronic multicriticality in bilayer graphene
- Superconductivity and correlated phases in non-twisted bilayer and trilayer graphene
- Tunable quantum anomalous Hall octet driven by orbital magnetism in bilayer graphene
- Antiferromagnetism in the Hubbard Model on the Bernal-stacked Honeycomb Bilayer
- Edge excitations of the canted antiferromagnetic phase of the quantum Hall state in graphene: a simplified analysis
- Transport Gap in Suspended Bilayer Graphene at Zero Magnetic Field
- Superconductivity from electronic interactions and spin-orbit enhancement in bilayer and trilayer graphene
- Weak-field Hall Resistivity and Spin/Valley Flavor Symmetry Breaking in Magic-Angle Twisted Bilayer Graphene
- Interacting electrons on trilayer honeycomb lattices
- Transport in disordered monolayer molybdenum disulfide nanoflakes: evidence for inhomogeneous charge transport
- Ferroelectric and anomalous quantum Hall states in bare rhombohedral trilayer graphene
- Spontaneous Layer-Pseudospin Domain Walls in Bilayer Graphene
- Energy gap of the even-denominator fractional quantum Hall state in bilayer graphene
- Magneto-optical and optical probes of gapped ground states of bilayer graphene
- Gapless Spin Wave Transport through a Quantum Canted-Antiferromagnet
- Gap generation and flat band catalysis in dice model with local interaction
- Distinct Competing Ordered ν=2 States in Bilayer Graphene
- Lattice Collective Modes from a Continuum Model of Magic-Angle Twisted Bilayer Graphene
- Flat band electrons and interactions in rhombohedral trilayer graphene
- Structure and the Lamb-shift-like quantum splitting of the pseudo-zero-mode Landau levels in bilayer graphene
- Electronic Instabilities of the AA-Honeycomb Bilayer
- Gross-Neveu-Heisenberg criticality from competing nematic and antiferromagnetic orders in bilayer graphene
- Pseudo-magnetic field distribution and pseudo-Landau levels in suspended graphene flakes
- Topological flat bands in a family of multilayer graphene moiré lattices
- Unconventional sequence of correlated Chern insulators in magic-angle twisted bilayer graphene
- Parallel transport and layer-resolved thermodynamic measurements in twisted bilayer graphene
- Quantum multicriticality of bilayer graphene in the presence of a tunable energy gap
- Weak Coupling Theory of Magic-Angle Twisted Bilayer Graphene
- Spontaneous Layer Polarization and Conducting Domain Walls in the Quantum Hall Regime of Bilayer Graphene
- Radio-frequency C-V measurements with sub-attofarad sensitivity
- Excitonic Instabilities and Insulating States in Bilayer Graphene
- Layer photovoltaic effect in van der Waals heterostructures
- Half-metal and other fractional metal phases in doped AB bilayer graphene
- Absence of heat flow in ν = 0 quantum Hall ferromagnet in bilayer graphene
- Quarter Metal Superconductivity
- Chirality and correlations in the spontaneous spin-valley polarization of rhombohedral multilayer graphene
- Domain Formation Driven by the Entropy of Topological Edge Modes
- Valley polarization, magnetization, and superconductivity in bilayer graphene near the van Hove singularity
- Coulomb center instability in bilayer graphene
- Landau Levels of Bilayer Graphene in a WSe/Bilayer Graphene van der Waals Heterostructure
- Inhomogeneity and nonlinear screening in gapped bilayer graphene
- Broken symmetry states in bilayer graphene in electric and in-plane magnetic fields
- Many-body effects, orbital mixing and cyclotron resonance in bilayer graphene
- Chiral universality class of the normal-superconducting and the exciton condensation transition on the surface of topological insulator
- Mean-field analysis of a Hubbard interaction on Bernal Bilayer Graphene
- Optical manifestations of symmetry breaking in bilayer graphene
- Orbital mixing in few-layer graphene and non-Abelian Berry phase
- Dynamical polarization in ABC-stacked multilayer graphene in a magnetic field
- Ordered states of undoped AB bilayer graphene: bias induced cascade of transitions