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arXiv · 2606.07752

Detecting Exciton Condensation through Charge Transport in Semiconductor Heterostructures

Caterina Zerba·Léo Mangeolle·Michael Knap
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Abstract

Direct evidence of exciton condensation in semiconductor heterostructures remains elusive. Here we propose charge transport of doped carriers as a probe of exciton condensation in transition-metal dichalcogenide heterostructures and identify distinct experimental signatures. First, condensation suppresses the phase space for carrier scattering, leading to a reduction in resistivity, that provides a general diagnostic of exciton condensation. Second, in heterostructures with a tunable solid-state Feshbach resonance, condensate-induced hybridization between doped carriers and trion bound states qualitatively modifies transport. In particular, near resonance, this hybridization yields a negative effective mass and a corresponding sign reversal of the Hall resistivity. These results establish charge transport as a promising route for detecting and characterizing exciton condensation in semiconductor heterostructures.

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Caterina Zerba, Léo Mangeolle, Michael Knap. 2026-06-05. Detecting Exciton Condensation through Charge Transport in Semiconductor Heterostructures. https://arxiv.org/abs/2606.07752

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