High quality magnetotransport in graphene using the edge-free Corbino geometry

Abstract

We report fabrication of graphene devices in a Corbino geometry consisting of concentric circular electrodes with no physical edge connecting the inner and outer electrodes. High device mobility is realized using boron nitride encapsulation together with a dual-graphite gate structure. Bulk conductance measurement in the quantum Hall effect (QHE) regime outperforms previously reported Hall bar measurements, with improved resolution observed for both the integer and fractional QHE states. We identify apparent phase transitions in the fractional sequence in both the lowest and first excited Landau levels (LLs) and observed features consistent with electron solid phases in higher LLs.

arXiv comment7 pages, 4 figures and 39 references

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Cited by in corpus (63)

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• Programming moiré patterns in 2D materials by bending
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• Odd- and even-denominator fractional quantum Hall states in monolayer WSe${}_2$
• Evidence for pairing states of composite fermions in double-layer graphene
• Realization of robust boundary modes and non-contractible loop states in photonic Kagome lattices
• Skyrmion solids in monolayer graphene
• Gate-Tunable Graphene Hall Sensors with High Magnetic Field Sensitivity
• High-quality electrical transport using scalable CVD graphene
• Experimental determination of the energy per particle in partially filled Landau levels
• Nano-photocurrent mapping of local electronic structure in twisted bilayer graphene
• Parton construction of particle-hole-conjugate Read-Rezayi parafermion fractional quantum Hall states and beyond
• Edge Channels of Broken-Symmetry Quantum Hall States in Graphene probed by Atomic Force Microscopy
• Fractional Quantum Hall Effect at $\nu =2+4/9$
• Electron spin resonance and collective excitations in magic-angle twisted bilayer graphene
• Fractional quantum Hall effect in CVD-grown graphene
• ${\mathbb{Z}}_n$ superconductivity of composite bosons and the $7/3$ fractional quantum Hall effect
• Energy gap of the even-denominator fractional quantum Hall state in bilayer graphene
• Optical sensing of fractional quantum Hall effect in graphene
• Strong-Magnetic-Field Magnon Transport in Monolayer Graphene
• Anyon braiding and telegraph noise in a graphene interferometer
• A non-Abelian fractional quantum Hall state at $3/7$ filled Landau level
• Upstream modes and antidots poison graphene quantum Hall effect
• Proximity screening greatly enhances electronic quality of graphene
• Observation of terahertz-induced magnetooscillations in graphene
• Particle-Hole Symmetry and the Fractional Quantum Hall Effect in the Lowest Landau Level
• Hydrodynamic thermoelectric transport in Corbino geometry
• Wiedemann-Franz law for massless Dirac fermions with implications for graphene
• Excitons in the Fractional Quantum Hall Effect
• Competition between fractional quantum Hall liquid and Wigner solid at small fillings: Role of layer thickness and Landau level mixing
• Graphene disk in a solenoid magnetic potential: Aharonov-Bohm effect without a two-slit-like setup
• Hydrodynamic magnetoresistance in graphene Corbino devices
• Landau level collapse in graphene in the presence of in-plane radial electric and perpendicular magnetic fields
• Parallel transport and layer-resolved thermodynamic measurements in twisted bilayer graphene
• Optical flux pump in the quantum Hall regime
• Valley and Zeeman Splittings in Multilayer Epitaxial Graphene Revealed by Circular Polarization Resolved Magneto-infrared Spectroscopy
• Sub-Sharvin conductance and enhanced shot noise in doped graphene
• Inducing a metal-insulator transition in disordered interacting Dirac fermion systems via an external magnetic field
• Milli-Tesla Quantization enabled by Tuneable Coulomb Screening in Large-Angle Twisted Graphene
• Terahertz chiral photonic-crystal cavities for Dirac gap engineering in graphene
• Competing Laughlin state and Wigner crystal in bilayer graphene
• Thermoelectric response and entropy of fractional quantum Hall systems
• Understanding Disorder in Monolayer Graphene Devices with Gate-Defined Superlattices
• Giant magnetoresistance in weakly disordered non-Galilean invariant conductors
• Spin and valley ordering of fractional quantum Hall states in monolayer graphene
• Theory of the sub-Sharvin charge transport in graphene disks
• Hetero-Orbital Two-Component Fractional Quantum Hall States in Bilayer Graphene
• Thermoelectric properties of the Corbino disk in graphene
• Time-dependent transport in Graphene Mach-Zender Interferometers
• Evidence for Topological Protection Derived from Six-Flux Composite Fermions
• Current distribution in magnetically confined 2DEG: semiclassical and quantum mechanical treatment
• Quantized heat flow in graphene quantum Hall phases: Probing the topological order
• Sub-Sharvin conductance and incoherent shot-noise in graphene disks at magnetic field
• Quantum transport of Dirac fermions in selected graphene nanosystems away from the charge-neutrality point
• Nonlinear hydrodynamic response of a quantum Hall system
• Microwave Imaging of Edge Conductivity in Graphene at Charge Neutrality and Quantum Hall States
• Tunneling Effect in Gapped Graphene Disk in Magnetic Flux and Electrostatic Potential
• Impact of in-situ controlled disorder screening on fractional quantum Hall effects and composite-fermion transport
• Gate tuning of fractional quantum Hall states in InAs two-dimensional electron gas
• Residual quantum coherent electron transport in doped graphene leads
• Controlled generation and detection of a thermal bias in Corbino devices under the quantum Hall regime
• Topological protection revealed by real-time longitudinal and transverse studies
• Interlayer exciton condensates between second Landau level orbitals in double bilayer graphene