Ankur Das, Sumathi Rao, Yuval Gefen, Ganpathy Murthy
Published 2021-03-10Version 1
Quantum Hall phases are gapped in the bulk but support chiral edge modes, both charged and neutral. Here we consider a circuit where the path from source to drain necessarily passes through a segment consisting solely of neutral modes. Surprisingly, we find that upon biasing the source, a dc current is detected at the drain. Thus, neutral modes carry information that can be used to nonlocally reconstruct a dc charge current. We conclude with a possible experimental realization of this phenomenon.
Comments: 5 pages, 4 figures
Spectrum of edge states in the $ν=0$ quantum Hall phases in graphene
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Suppression of interference in quantum Hall Mach-Zehnder geometry by upstream neutral modes
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