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June 7, 2026Nature CommunicationsOpen Access

Thermoelectric Detection of Crossed Andreev Reflections in Quantum Hall/Superconductor Hybrid Structures

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The research aims to explore the thermoelectric detection of crossed Andreev reflections at quantum Hall/superconductor interfaces.
Interfaced quantum Hall edge modes of Cd3As2 films with a NbN superconductor strip.
Measured downstream resistance and thermoelectric response under varying magnetic fields.
Observed oscillations in downstream resistance and thermoelectric response with changing magnetic fields.
Found that electron-like carriers predominantly influenced the ohmic response due to elastic co-tunneling.
Identified alternating signs in thermoelectric response, indicating complex interactions between Andreev and tunneling processes.

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Randomized trial investigates thermoelectric responses at quantum Hall/superconductor interfaces, suggesting new insights into Andreev processes.

Wang et al. (2026) studied this question.

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Randomized trial investigates thermoelectric responses at quantum Hall/superconductor interfaces, suggesting new insights into Andreev processes.