{
  "abstract": "Copropagating quantum Hall edge channels provide a promising platform for compact electron interferometry and flying quantum states. In silicon, the valley degree of freedom offers a natural alternative to spin-resolved edge channels because spin-flip scattering is strongly suppressed by the weak spin-orbit interaction. Here, we investigate interchannel transitions between copropagating valley edge channels in a double-layer-gated silicon metal-oxide-semiconductor field-effect transistor. With the bulk filling factor set to $ν=2$, two spin-polarized valley edge channels are brought into close proximity near a depleted side gate. We observe strong intervalley mixing, with a transition probability close to 1/2, indicating nearly complete equilibration between the two valley edge channels. In contrast, interchannel transport between edge channels with different spin orientations shows negligible transition probability, consistent with suppressed spin-flip scattering in silicon. These results demonstrate that intervalley coupling at a Si/SiO$_2$ interface can provide a beam-splitter-like operation for copropagating valley edge channels, establishing a key building block toward compact silicon quantum Hall interferometers.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Journal of Applied Physics 140, 164402 (2026)",
  "arxiv": "2607.15675",
  "author_total": 2,
  "authors": [
    {
      "name": "Gento Yamahata"
    },
    {
      "name": "Takase Shimizu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/513v8ecrb8td0.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.15675",
  "fulltext_url": null,
  "id": "513v8ecrb8td0",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.15675",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mes-hall"
    ],
    [
      "arxiv",
      "quant-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2607.15675",
  "pmcid": null,
  "pmid": null,
  "published": "2026-07-17",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/513v8ecrb8td0.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:15Z",
      "native_id": "2607.15675",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.15675"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mes-hall",
      "subfield": "condensed-matter"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Strong intervalley mixing between copropagating quantum Hall edge channels in a silicon MOSFET",
  "title_text": "Strong intervalley mixing between copropagating quantum Hall edge channels in a silicon MOSFET",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:15Z",
  "url": "https://research.draconitic.com/paper/513v8ecrb8td0",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1063/5.0352804",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}