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Quasiparticle Andreev scattering in the ν = 1/3 fractional quantum Hall regime

Author

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  • P. Glidic

    (Centre de Nanosciences et de Nanotechnologies)

  • O. Maillet

    (Centre de Nanosciences et de Nanotechnologies)

  • C. Piquard

    (Centre de Nanosciences et de Nanotechnologies)

  • A. Aassime

    (Centre de Nanosciences et de Nanotechnologies)

  • A. Cavanna

    (Centre de Nanosciences et de Nanotechnologies)

  • Y. Jin

    (Centre de Nanosciences et de Nanotechnologies)

  • U. Gennser

    (Centre de Nanosciences et de Nanotechnologies)

  • A. Anthore

    (Centre de Nanosciences et de Nanotechnologies
    Centre de Nanosciences et de Nanotechnologies)

  • F. Pierre

    (Centre de Nanosciences et de Nanotechnologies)

Abstract

The scattering of exotic quasiparticles may follow different rules than electrons. In the fractional quantum Hall regime, a quantum point contact (QPC) provides a source of quasiparticles with field effect selectable charges and statistics, which can be scattered on an ‘analyzer’ QPC to investigate these rules. Remarkably, for incident quasiparticles dissimilar to those naturally transmitted across the analyzer, electrical conduction conserves neither the nature nor the number of the quasiparticles. In contrast with standard elastic scattering, theory predicts the emergence of a mechanism akin to the Andreev reflection at a normal-superconductor interface. Here, we observe the predicted Andreev-like reflection of an e/3 quasiparticle into a − 2e/3 hole accompanied by the transmission of an e quasielectron. Combining shot noise and cross-correlation measurements, we independently determine the charge of the different particles and ascertain the coincidence of quasielectron and fractional hole. The present work advances our understanding on the unconventional behavior of fractional quasiparticles, with implications toward the generation of novel quasi-particles/holes and non-local entanglements.

Suggested Citation

  • P. Glidic & O. Maillet & C. Piquard & A. Aassime & A. Cavanna & Y. Jin & U. Gennser & A. Anthore & F. Pierre, 2023. "Quasiparticle Andreev scattering in the ν = 1/3 fractional quantum Hall regime," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-36080-4
    DOI: 10.1038/s41467-023-36080-4
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    References listed on IDEAS

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    1. Hiroyuki Inoue & Anna Grivnin & Yuval Ronen & Moty Heiblum & Vladimir Umansky & Diana Mahalu, 2014. "Proliferation of neutral modes in fractional quantum Hall states," Nature Communications, Nature, vol. 5(1), pages 1-7, September.
    2. Z. Iftikhar & A. Anthore & S. Jezouin & F. D. Parmentier & Y. Jin & A. Cavanna & A. Ouerghi & U. Gennser & F. Pierre, 2016. "Primary thermometry triad at 6 mK in mesoscopic circuits," Nature Communications, Nature, vol. 7(1), pages 1-7, December.
    3. Ofir Shein Lumbroso & Lena Simine & Abraham Nitzan & Dvira Segal & Oren Tal, 2018. "Electronic noise due to temperature differences in atomic-scale junctions," Nature, Nature, vol. 562(7726), pages 240-244, October.
    4. E. Comforti & Y. C. Chung & M. Heiblum & V. Umansky & D. Mahalu, 2002. "Bunching of fractionally charged quasiparticles tunnelling through high-potential barriers," Nature, Nature, vol. 416(6880), pages 515-518, April.
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