{
  "abstract": "Nanoscale self-heating involves phonon transport across confined geometries, material interfaces, and temperature fields over which the scattering rates can vary substantially. We develop PhonoMC, an occupation-based deviational Monte Carlo method for solving the phonon Boltzmann transport equation within the relaxation-time approximation. A fixed equilibrium state is retained as the deviational reference, while the local temperature reconstructed from the represented energy is used to evaluate mode-dependent scattering rates. Collisions are updated with a separately determined relaxation temperature to conserve energy over each time step, and prescribed lattice heating is introduced by changing carrier occupations rather than continuously adding computational particles. For cross-plane transport through a 100-nm Si film, the deviational formulation reproduces the full-population heat flux while reducing its standard deviation by a factor of approximately 3.3 at \\(ΔT=100\\)~K with \\(10^5\\) carriers. In contrast, keeping the scattering rates fixed at 300~K overestimates the heat flux by 23.7\\% at \\(ΔT=250\\)~K. Calculations of Si thin films distinguish finite-length effects from surface-scattering suppression, and Si/3C-SiC bilayers are used to examine interfacial thermal resistance. The method is further applied to localized heating in FinFET-like structures, where replacing the lower Si substrate with higher-conductivity 3C-SiC leads to a higher hotspot temperature because of the additional resistance associated with the confined Si region and the Si/SiC interface. These results show that a fixed deviational reference can be combined with local temperature-dependent scattering and sustained heat deposition in a mode-resolved Monte Carlo description of nanoscale thermal transport.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.21884",
  "author_total": 7,
  "authors": [
    {
      "name": "Shixian Liu"
    },
    {
      "name": "Fei Yin"
    },
    {
      "name": "Gang Wang"
    },
    {
      "name": "Bin Liu"
    },
    {
      "name": "Ge Zhang"
    },
    {
      "name": "Alexander A. Barinov"
    },
    {
      "name": "Ke Xu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2na78crkdjhj9.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.21884",
  "fulltext_url": null,
  "id": "2na78crkdjhj9",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.21884",
  "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.mtrl-sci"
    ],
    [
      "openalex",
      "2505|Thermal properties of materials"
    ]
  ],
  "openalex": "W7213883341",
  "pdf_url": "https://arxiv.org/pdf/2609.21884",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-18",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/2na78crkdjhj9.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:03Z",
      "native_id": "2609.21884",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.21884"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "PhonoMC: Occupation-based deviational Monte Carlo for phonon transport with temperature-dependent scattering",
  "title_text": "PhonoMC: Occupation-based deviational Monte Carlo for phonon transport with temperature-dependent scattering",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:03Z",
  "url": "https://research.draconitic.com/paper/2na78crkdjhj9",
  "venue": "arXiv",
  "versions": []
}