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 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 Letter may pave the road to engineering a future generation of hybrid devices for exploiting superconductivity proximity in chiral channels.






Published Version (Please cite this version)


Publication Info

Zhao, Lingfei, Zubair Iftikhar, Trevyn FQ Larson, Ethan G Arnault, Kenji Watanabe, Takashi Taniguchi, François Amet, Gleb Finkelstein, et al. (2023). Loss and Decoherence at the Quantum Hall-Superconductor Interface. Physical review letters, 131(17). p. 176604. 10.1103/physrevlett.131.176604 Retrieved from https://hdl.handle.net/10161/29567.

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Gleb Finkelstein

Professor of Physics

Gleb Finkelstein is an experimentalist interested in physics of quantum nanostructures, such as Josephson junctions and quantum dots made of carbon nanotubes, graphene, and topological materials. These objects reveal a variety of interesting electronic properties that may form a basis for future quantum devices.

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