Is the charge determined via shot noise measurements unique?

Abstract

Charged excitations in the fractional quantum Hall effect are known to carry fractional charges, as theoretically predicted and experimentally verified. Here we report on the dependence of the tunneling quasiparticle charge, as determined via highly sensitive shot noise measurements, on the measurement conditions, in the odd denominators states v=1/3 and v=7/3 and in the even denominator state v=5/2. In particular, for very weak backscattering probability and sufficiently small excitation energies (temperature and applied voltage), tunneling charges across a constriction were found to be significantly higher than the theoretically predicted fundamental quasiparticle charges.

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Cited by in corpus (45)

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• Observation of half-integer thermal Hall conductance
• Quantum Hall Physics - hierarchies and CFT techniques
• Observation of neutral modes in the fractional quantum Hall regime
• Local Charge of the nu=5/2 Fractional Quantum Hall State
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• Fabry-Perot Interferometry with Fractional Charges
• Characterizing Neutral Modes of Fractional States in the Second Landau Level
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• Shot Noise in Mesoscopic Systems: from Single Particles to Quantum Liquids
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• Charge tunneling in fractional edge channels
• Numerical Calculation of the Neutral Fermion Gap at $\nu =5/2$
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• Microwave photons emitted by fractionally charged quasiparticles
• Unified time-dependent perturbative relations applied to spectroscopy through photo-drag current
• Scaling dimension of quantum Hall quasiparticles from tunneling current noise measurements
• Energy Gap and Spin Polarization in the 5/2 Fractional Quantum Hall Effect
• Entanglement Measures for Quasi-Two-Dimensional Fractional Quantum Hall States
• Interaction effects in a multi-channel Fabry-Pérot interferometer in the Aharonov-Bohm regime
• Probing quantum phases in ultra-high-mobility two-dimensional electron systems using surface acoustic waves
• Fractional quantum Hall effect at the filling factor $\nu =5/2$
• Molecular anyons in fractional quantum Hall effect
• Noise of a chargeless Fermi liquid
• Finite frequency noise for edge states at filling factor $\nu =2/5$
• Splitting of roton minimum in the ν=5/2 Moore-Read state
• Finite frequency noise spectroscopy for fractional Hall states at ν = 5/2
• Quasiparticle agglomerates in Read-Rezayi and anti Read-Rezayi state
• Non-Abelian phases from the condensation of Abelian anyons
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• Photo-assisted shot noise probes multiple charge carriers in quantum Hall edges
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• Finite frequency noise for Laughlin state investigated by a resonant circuit