New Paradigm for Edge Reconstruction of Fractional States: Part Two - Noise

The recent, unexpected, findings of upstream neutral modes in particle-like fractional quantum Hall states, led to a realization that the nature of the neutral modes is far from being understood. Moreover, the observation of spatially separated of (at least) two downstream charge modes in hole-conju...

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Published inarXiv.org
Main Authors Sabo, Ron, Gurman, Itamar, Rosenblatt, Amir, Lafont, Fabien, Banitt, Daniel, Park, Jinhong, Heiblum, Moty, Gefen, Yuval, Umansky, Vladimir, Mahalu, Diana
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 24.10.2016
Subjects
Noise
Propagation modes
Resistance
Shot noise
Upstream
Variations
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Summary:The recent, unexpected, findings of upstream neutral modes in particle-like fractional quantum Hall states, led to a realization that the nature of the neutral modes is far from being understood. Moreover, the observation of spatially separated of (at least) two downstream charge modes in hole-conjugate states (see Part One - Conductance), still faces unresolved contradictions between conductance and noise measurements. In this work we show how current fluctuations measured in various configurations shed light on the interplay between neutral and charge modes. We demonstrate that once one of the charge modes is taken out of equilibrium, counter-propagating neutral modes born in the equilibration process affect the upstream charge modes, giving rise to a novel mechanism for shot noise with quantized Fano factors. We present a theoretical model that accounts for most of the experimental observations.
Bibliography:content type line 50
SourceType-Working Papers-1
ObjectType-Working Paper/Pre-Print-1
ISSN:2331-8422