{
  "abstract": "We show that the transconductance of multilayer WSe$_2$ field-effect transistors serves as a direct electrical spectrometer of the intervalley relaxation time $τ_{\\rm iv}$, previously accessible only by ultrafast optical techniques. Extending an equilibrium valley-thermodynamics framework with a single relaxation equation for the $Γ$-valley carrier fraction $f_Γ(t)$, we predict three signatures: (i)~a Lorentzian transconductance $g_m(ω)=g_{m,0}+g_{m,v}^0/(1+iωτ_{\\rm iv})$, whose imaginary part peaks at $ω_c=τ_{\\rm iv}^{-1}$ with opposite signs for bilayer and trilayer; (ii)~a two-stage current transient after a gate step, exhibiting bilayer overshoot or trilayer undershoot; and (iii)~sweep-rate-proportional hysteresis whose gate-voltage profile and the layer-dependent transconductance sign reversal distinguish valley from trap-induced dynamics. All three signatures provide quantitative electrical access to $τ_{\\rm iv}$ with standard radio-frequency (rf) and direct-current (dc) instrumentation.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Phys. Rev. B 114, 105421 (2026)",
  "arxiv": "2606.10470",
  "author_total": 1,
  "authors": [
    {
      "name": "Katsunori Wakabayashi"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/60ve79yp4w5gg.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.10470",
  "fulltext_url": null,
  "id": "60ve79yp4w5gg",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.10470",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mes-hall"
    ],
    [
      "arxiv",
      "cond-mat.mtrl-sci"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2606.10470",
  "pmcid": null,
  "pmid": null,
  "published": "2026-07-13",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/60ve79yp4w5gg.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:41Z",
      "native_id": "2606.10470",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.10470"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mes-hall",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Electrical Spectroscopy of Intervalley Relaxation in WSe$_2$ Transistors",
  "title_text": "Electrical Spectroscopy of Intervalley Relaxation in WSe_2 Transistors",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:41Z",
  "url": "https://research.draconitic.com/paper/60ve79yp4w5gg",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/p8mx-dr9j",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}