Corpus ID: 236447579

Observation of ballistic upstream modes at fractional quantum Hall edges of graphene

@inproceedings{Kumar2021ObservationOB,
  title={Observation of ballistic upstream modes at fractional quantum Hall edges of graphene},
  author={Ravi Kumar and Saurabh Kumar Srivastav and Christian Spaanslatt and K. Watanabe and T. Taniguchi and Yuval Gefen and Alexander D. Mirlin and Anindya Sundar Das},
  year={2021}
}
1Department of Physics, Indian Institute of Science, Bangalore, 560012, India. 2Department of Microtechnology and Nanoscience (MC2),Chalmers University of Technology, S-412 96 Göteborg, Sweden. 3Institute for Quantum Materials and Technologies, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany. 4Institut für Theorie der Kondensierten Materie, Karlsruhe Institute of Technology, 76128 Karlsruhe, Germany. 5National Institute of Material Science, 1-1 Namiki, Tsukuba 305-0044, Japan… Expand

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The nature of edge state transport in quantum Hall systems has been studied intensely ever since Halperin [1] noted its importance for the quantization of the Hall conductance. Since then, there haveExpand
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The direct observation of counter-propagating neutral modes for fillings of 2/3, 3/5 and 5/2 is reported, finding that the resultant shot noise is proportional to the injected current. Expand
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The authors observe the edge-mode equilibration transition that was predicted for the ν=2/3 fractional quantum Hall state, and present an approach to synthetize a v = 2/ 3 edge mode from its basic counter-propagating charged constituents, allowing a controlled equilibrations between the two counter- Propagating charge modes. Expand
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Two-dimensional topological insulators, and in particular quantum Hall states, are characterized by an insulating bulk and a conducting edge. Fractional states may host both downstream (dictated byExpand
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Abstract Electric and thermal transport properties of a ν = 2 ∕ 3 fractional quantum Hall junction are analyzed. We investigate the evolution of the electric and thermal two-terminal conductances, GExpand
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The braiding statistics of certain fractional quantum Hall states can be probed via interferometry of their edge states. Practical difficulties—including loss of phase coherence—make this aExpand
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By tuning in situ the edge path, the experiment reveals a chargeless heat transport from a significant heating that occurs upstream of the power injection point, in the absence of a concomitant electrical current. Expand
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