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Strongly interacting 2D electron systems: Evidence for enhanced 1D edge-channel coupling

Published 9 Jul 2023 in cond-mat.mes-hall and cond-mat.str-el | (2307.04174v2)

Abstract: We observe nearly vanishing Hall resistances for integer filling factors in a counterflow (CF) experiment on a density balanced 2D bilayer system. Filling factor dependent equilibration lengths demonstrate enhanced 1D coupling via edge-channels. Due to the narrow barrier the edge-modes of the two 2DEGs are in close proximity allowing for 1D excitonic correlations. Electron drag measurements confirm the observed quantum state selective coupling between the layers.

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