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Loss and decoherence at the quantum Hall - superconductor interface

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arxiv 2210.04842 v2 pith:ILY6F3FC submitted 2022-10-10 cond-mat.mes-hall cond-mat.supr-con

Lingfei Zhao , Zubair Iftikhar , Trevyn F.Q. Larson , Ethan G. Arnault , Kenji Watanabe , Takashi Taniguchi , Francois Amet , Gleb Finkelstein This is my paper · ORCID
classification cond-mat.mes-hallcond-mat.supr-con
keywords andreevconversionelectronshallinterfacequantumsuperconductorabsorb
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We perform a systematic study of Andreev conversion at the interface between a superconductor and graphene in the quantum Hall (QH) regime. We find that the probability of Andreev conversion from electrons to holes follows an unexpected but clear trend: the dependencies on temperature and magnetic field are nearly decoupled. We discuss these trends and the role of the superconducting vortices, whose normal cores could both absorb and dephase the individual electrons in a QH edge. Our study may pave the road to engineering future generation of hybrid devices for exploiting superconductivity proximity in chiral channels.

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  1. Quantum Hall Andreev Conversion in Graphene Nanostructures

    cond-mat.mes-hall 2025-07 conditional novelty 6.0 of 10

    Chiral Andreev conversion at partially transparent graphene-superconductor interfaces is robust, not valley-degenerate, and can show interference oscillations from intervalley scattering at corners.

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