Counter-propagating charge transport in the quantum Hall effect regime

Abstract

The quantum Hall effect, observed in a two-dimensional electron gas subjected to a perpendicular magnetic field, imposes a 1D-like chiral, downstream, transport of charge carriers along the sample edges. Although this picture remains valid for electrons and Laughlin's fractional quasiparticles, it no longer holds for quasiparticles in the so-called hole-conjugate states. These states are expected, when disorder and interactions are weak, to harbor upstream charge modes. However, so far, charge currents were observed to flow exclusively downstream in the quantum Hall regime. Studying the canonical spin-polarized and spin-unpolarized $\nu =2/3$ hole-like states in GaAs-AlGaAs heterostructures, we observed a significant upstream charge current at short propagation distances in the spin unpolarized state

References in corpus (17)

• Universal topological quantum computation from a superconductor/Abelian quantum Hall heterostructure
• Randomness at the Edge: Theory of Quantum Hall transport at filling $\nu =2/3$
• Observation of neutral modes in the fractional quantum Hall regime
• A New Type of Electron Nuclear-Spin Interaction from Resistively Detected NMR in the Fractional Quantum Hall Effect Regime
• Edge reconstruction in the $\nu =2/3$ fractional quantum Hall state
• Proliferation of neutral modes in fractional quantum Hall states
• A New Paradigm for Edge Reconstruction in Fractional Quantum Hall States
• Exotic circuit elements from zero-modes in hybrid superconductor/quantum Hall systems
• Composite Edge States in the $\nu =2/3$ Fractional Quantum Hall Regime
• Extracting net current from an upstream neutral mode in the fractional quantum Hall regime
• Non-Equilibrated Counter Propagating Edge Modes in the Fractional Quantum Hall Regime
• Parafermion supporting platform based on spin transitions in the fractional quantum Hall effect regime
• Microscopic Study of Edge Excitations of Spin-Polarized and Spin-Unpolarized $\nu =2/3$ Fractional Quantum Hall Effect
• Non-equilibrium fractional quantum Hall states visualized by optically detected MRI
• Transmission of heat modes across a potential barrier
• Current Induced Nuclear Spin Depolarization at Landau Level Filling Factor nu=1/2
• Non-local polarization feedback in a fractional quantum Hall ferromagnet

Cited by in corpus (25)

• Observation of ballistic upstream modes at fractional quantum Hall edges of graphene
• Absent thermal equilibration on fractional quantum Hall edges over macroscopic scale
• Noise on complex quantum Hall edges: Chiral anomaly and heat diffusion
• Determination of topological edge quantum numbers of fractional quantum Hall phases
• Heat equilibration of integer and fractional quantum Hall edge modes in graphene
• Contacts, equilibration, and interactions in fractional quantum Hall edge transport
• Energy relaxation in edge modes in the quantum Hall effect
• Thermal equilibration on the edges of topological liquids
• Half-integer conductance plateau at the $\nu =2/3$ fractional quantum Hall state in a quantum point contact
• Quantized charge fractionalization at quantum Hall Y junctions in the disorder-dominated regime
• Thermal conductance and noise of Majorana modes along interfaced $\nu =5/2$ fractional quantum Hall states
• Transport in helical Luttinger liquids in the fractional quantum Hall regime
• Counterflowing edge current and its equilibration in quantum Hall devices with sharp edge potential: Roles of incompressible strips and contact configuration
• Theory of Competing Charge Density Wave, Kekule and Antiferromagnetic ordered Fractional Quantum Hall states in Graphene aligned with Boron Nitride
• Emergence of Neutral Modes in Laughlin-like Fractional Quantum Hall Phases
• Coherent-Incoherent Crossover of Charge and Neutral Mode Transport as Evidence for the Disorder-Dominated Fractional Edge Phase
• Fingerprints of anti-Pfaffian topological order in quantum point contact transport
• Plasmon modes of coupled quantum Hall edge channels in the presence of disorder-induced tunneling
• Different fractional charges from auto- and cross-correlation noise in quantum Hall states without upstream modes
• Transport Signatures of Fractional Quantum Hall Binding Transitions
• Spin-Selective Equilibration among Integer Quantum Hall Edge Channels
• Edge Reconstruction and Emergent Neutral Modes in Integer and Fractional Quantum Hall Phases
• Ballistic-to-diffusive transition in engineered counter-propagating quantum Hall channels
• Adiabatic charge transport through non-Bloch bands
• Counterpropagating topological and quantum Hall edge channels