Unconventional fractional quantum Hall states and Wigner crystallization in suspended Corbino graphene

Abstract

Competition between liquid and solid states in two-dimensional electron system is an intriguing problem in condensed matter physics. We have investigated competing Wigner crystal and fractional quantum Hall ( FQH ) liquid phases in atomically thin suspended graphene devices in Corbino geometry. Low temperature magnetoconductance and transconductance measurements along with $IV$ characteristics all indicate strong charge density dependent modulation of electron transport. Our results show unconventional FQH phases which do not fit the standard Jain's series for conventional FQH states, instead they appear to originate from residual interactions of composite fermions in partially filled higher Landau levels. And at very low charge density with filling factors $\nu \lesssim$ 1/5, electrons crystallize into an ordered Wigner solid which eventually transforms into an incompressible Hall liquid at filling factors around $\nu \le$ 1/7. Building on the unique sample structure, our experiments pave the way for enhanced understanding of the ordered phases of interacting electrons.

23+29 pages and 4+10 figures

References in corpus (23)

• Multicomponent fractional quantum Hall effect in graphene
• Evidence of the role of contacts on the observed electron-hole asymmetry in graphene
• Digital and FM demodulation of a doubly-clamped single wall carbon nanotube oscillator: towards a nanotube cell phone
• Melting of a 2D Quantum Electron Solid in High Magnetic Field
• Large yield production of high mobility freely suspended graphene electronic devices on a PMGI based organic polymer
• Microwave Resonance of 2D Wigner Crystal around integer Landau fillings
• The Effects of Landau level mixing on the fractional quantum Hall effect in monolayer Graphene
• Conformal mapping and shot noise in graphene
• Electron-phonon coupling in suspended graphene: supercollisions by ripples
• Modulation of mechanical resonance by chemical potential oscillation in graphene
• Evidence for Two Different Solid Phases of Two Dimensional Electrons in High Magnetic Fields
• Fractional Quantum Hall Effect at Landau Level Filling nu=4/11
• Observation of Incompressibility at $\nu =4/11$ and $\nu =5/13$
• Wigner crystal and bubble phases in graphene in the quantum Hall regime
• Visualisation of edge effects in side-gated graphene nanodevices
• Transconductance fluctuations as a probe for interaction induced quantum Hall states in graphene
• Contact doping, Klein tunneling, and asymmetry of shot noise in suspended graphene
• Shot-noise evidence of fractional quasiparticle creation in a local fractional quantum Hall state
• Fractional quantum Hall edge: Effect of nonlinear dispersion and edge roton
• Model for Dissipative Conductance in Fractional Quantum Hall States
• Electron-solid and electron-liquid phases in graphene
• Melting of Wigner crystal in high-mobility $n$-GaAs/AlGaAs heterostructures at filling factors $0.18>\nu >0.125$: Acoustic studies
• Gyrotropic Zener tunneling and nonlinear IV curves in the zero-energy Landau level of graphene in a strong magnetic field

Cited by in corpus (27)

• Statics and Dynamics of Skyrmions Interacting with Pinning: A Review
• High quality magnetotransport in graphene using the edge-free Corbino geometry
• Tunable quantum anomalous Hall octet driven by orbital magnetism in bilayer graphene
• Realization of robust boundary modes and non-contractible loop states in photonic Kagome lattices
• Theory of the collective magnetophonon resonance and melting of the field-induced Wigner solid
• Probing the tunable multi-cone bandstructure in Bernal bilayer graphene
• Wiedemann-Franz law for massless Dirac fermions with implications for graphene
• Parton wave function for the fractional quantum Hall effect at $\nu =6/17$
• Nature of the anomalous $4/13$ fractional quantum Hall effect in graphene
• Mesoscopic valley filter in graphene Corbino disk containing a p-n junction
• Graphene disk in a solenoid magnetic potential: Aharonov-Bohm effect without a two-slit-like setup
• Quarter- and half-filled quantum Hall states and their topological orders revealed by daughter states in bilayer graphene
• Electronic viscosity and energy relaxation in neutral graphene
• Corbino magnetoresistance in neutral graphene
• Gyrotropic Zener tunneling and nonlinear IV curves in the zero-energy Landau level of graphene in a strong magnetic field
• Sub-Sharvin conductance and enhanced shot noise in doped graphene
• A Perspective on Collective Properties of Atoms on 2D Materials
• Quantum solid phase and Coulomb drag in two-dimensional electron-electron bilayers of MoS2
• Dry transfer method for suspended graphene on lift-off-resist: simple ballistic devices with Fabry-Pérot interference
• Graphene resonator as an ultrasound detector for generalized Love waves in a polymer film with two level states
• De Haas-van Alphen effect in graphene
• Sub-Sharvin conductance and incoherent shot-noise in graphene disks at magnetic field
• Notes from the bulk: metric dependence of the edge states of Chern-Simons theory
• Composite fermions and parton wavefunctions in twisted graphene on hexagonal boron nitride
• Strong magnetoresistance in a graphene Corbino disk at low magnetic fields
• Electrical low-frequency $1/f^{\gamma }$ noise due to surface diffusion of scatterers on an ultra low noise graphene platform
• Tunneling Effect in Gapped Graphene Disk in Magnetic Flux and Electrostatic Potential