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Quantized charge fractionalization at quantum Hall Y junctions in the disorder dominated regime

Author

Listed:
  • Chaojing Lin

    (Tokyo Institute of Technology
    Tokyo Institute of Technology)

  • Masayuki Hashisaka

    (NTT Corporation)

  • Takafumi Akiho

    (NTT Corporation)

  • Koji Muraki

    (NTT Corporation)

  • Toshimasa Fujisawa

    (Tokyo Institute of Technology)

Abstract

Fractionalization is a phenomenon where an elementary excitation partitions into several pieces. This picture explains non-trivial transport through a junction of one-dimensional edge channels defined by topologically distinct quantum Hall states, for example, a hole-conjugate state at Landau-level filling factor ν = 2/3. Here we employ a time-resolved scheme to identify an elementary fractionalization process; injection of charge q from a non-interaction region into an interacting and scattering region of one-dimensional channels results in the formation of a collective excitation with charge (1−r)q by reflecting fractionalized charge rq. The fractionalization factors, r = 0.34 ± 0.03 for ν = 2/3 and r = 0.49 ± 0.03 for ν = 2, are consistent with the quantized values of 1/3 and 1/2, respectively, which are expected in the disorder dominated regime. The scheme can be used for generating and transporting fractionalized charges with a well-defined time course along a well-defined path.

Suggested Citation

  • Chaojing Lin & Masayuki Hashisaka & Takafumi Akiho & Koji Muraki & Toshimasa Fujisawa, 2021. "Quantized charge fractionalization at quantum Hall Y junctions in the disorder dominated regime," Nature Communications, Nature, vol. 12(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-020-20395-7
    DOI: 10.1038/s41467-020-20395-7
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