Loss and decoherence at the quantum Hall - superconductor interface

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 f...

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Bibliographic Details
Published inarXiv.org
Main Authors Zhao, Lingfei, Zubair Iftikhar, Larson, Trevyn F Q, Arnault, Ethan G, Watanabe, Kenji, Taniguchi, Takashi, Amet, Francois, Finkelstein, Gleb
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 01.12.2023
Subjects
Conversion
Electrons
Graphene
Physics - Mesoscale and Nanoscale Physics
Physics - Superconductivity
Quantum Hall effect
Superconductivity
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.2210.04842