Extracting net current from an upstream neutral mode in the fractional quantum Hall regime

Abstract

Upstream neutral modes, counter propagating to charge modes and carrying energy without net charge, had been predicted to exist in some of the fractional quantum Hall states and were recently observed via noise measurements. Understanding such modes will assist in identifying the wavefunction of these states, as well as shedding light on the role of Coulomb interactions within edge modes. In this work, performed mainly in the nu=2/3 state, we placed a quantum dot a few micrometers upstream of an ohmic contact, which served as a neutral modes source. We showed the neutral modes heat the input of the dot, causing a net thermo-electric current to flow through it. Heating of the electrons led to a decay of the neutral mode, manifested in the vanishing of the thermo-electric current at T>110mK. This setup provides a straightforward method to investigate upstream neutral modes without turning to the more cumbersome noise measurements.

35 pages, 5 figures

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Cited by in corpus (41)

• Observed Quantization of Anyonic Heat Flow
• Proliferation of neutral modes in fractional quantum Hall states
• A New Paradigm for Edge Reconstruction in Fractional Quantum Hall States
• Transport in a disordered $\nu =2/3$ fractional quantum Hall junction
• Incoherent transport on the $\nu =2/3$ quantum Hall edge
• Shot Noise in Mesoscopic Systems: from Single Particles to Quantum Liquids
• Synthesizing a Fractional v=2/3 State from Particle and Hole States
• Observation of ballistic upstream modes at fractional quantum Hall edges of graphene
• Minimal excitation states for heat transport in driven quantum Hall systems
• Creating topological interfaces and detecting chiral edge modes in a 2D optical lattice
• Counter-propagating charge transport in the quantum Hall effect regime
• Suppression of interference in quantum Hall Mach-Zehnder geometry by upstream neutral modes
• Fractional Edge Reconstruction in Integer Quantum Hall Phases
• Phenomenological theory of heat transport in the fractional quantum Hall effect
• Non-Equilibrated Counter Propagating Edge Modes in the Fractional Quantum Hall Regime
• Contacts, equilibration, and interactions in fractional quantum Hall edge transport
• Optimal thermoelectricity with quantum spin-Hall edge states
• Edge Probes of Topological Order
• Enhanced thermoelectric response in the fractional quantum Hall effect
• Helical spin thermoelectrics controlled by a side-coupled magnetic quantum dot in the quantum spin Hall state
• Transport in helical Luttinger liquids in the fractional quantum Hall regime
• Topological dephasing in the $\nu =2/3$ fractional Quantum Hall Regime
• Heat transport through quantum Hall edge states: Tunneling versus capacitive coupling to reservoirs
• Transmission of heat modes across a potential barrier
• 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
• Second Landau Level Fractional Quantum Hall Effects in the Corbino Geometry
• Chirality and Current-Current Correlation in Fractional Quantum Hall Systems
• Coherent-Incoherent Crossover of Charge and Neutral Mode Transport as Evidence for the Disorder-Dominated Fractional Edge Phase
• Coulomb blockade with neutral modes
• Symmetry-related transport on a fractional quantum Hall edge
• Thermoelectric properties of Coulomb-blockaded fractional quantum Hall islands
• Thermopower and thermoelectric power factor of ${\mathbb{Z}}_k$ parafermion quantum dots
• Edge Reconstruction and Emergent Neutral Modes in Integer and Fractional Quantum Hall Phases
• Statistics of energy dissipation in a quantum dot operating in the cotunneling regime
• Unexpected tunneling current from downstream neutral modes
• Thermoelectric characteristics of ${\mathbb{Z}}_k$ parafermion Coulomb islands
• Elevated Hall Responses as Indicators of Edge Reconstruction
• Controlled generation and detection of a thermal bias in Corbino devices under the quantum Hall regime
• Superconductivity of neutral modes in quantum Hall edges
• Thermopower in the Coulomb blockade regime for Laughlin quantum dots