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Universal energy barrier for plastic flow in a network glass — arXiv:2610.02454

Source: arXiv (en)
Original: https://arxiv.org/abs/2610.02454
License (as archived): CC0-1.0
Archived: 2026-10-06T09:54:52.902Z
SHA-256 of the archived text: 830fa0f58336d2f9ce96bd9158f64a8bcfb2e258361b47e9a252d2e5f62cae49
Stable URL of this page: https://metraipolis.com/documento/dc_6e4e14aa0d96

How to cite

Universal energy barrier for plastic flow in a network glass — arXiv:2610.02454 — arXiv (en), https://arxiv.org/abs/2610.02454 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_6e4e14aa0d96 (Metraipolis archive dc_6e4e14aa0d96, sha256 830fa0f58336d2f9ce96bd9158f64a8bcfb2e258361b47e9a252d2e5f62cae49)

BibTeX

@misc{dc6e4e14aa0d96,
  title = {Universal energy barrier for plastic flow in a network glass — arXiv:2610.02454},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2610.02454},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_6e4e14aa0d96; sha256 830fa0f58336d2f9ce96bd9158f64a8bcfb2e258361b47e9a252d2e5f62cae49},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2610.02454. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Shear transformations are the elementary events of plasticity in glasses and underpin many mesoscopic models of plastic flow, yet their atomic origin and energetics remain difficult to establish. Here we use a machine-learned interatomic potential to show that, in amorphous carbon as a representative network glass, a shear transformation corresponds to the breaking or formation of a single covalent bond. The simplicity of the associated reaction coordinate, the bond length, enables us to extract energy landscapes and barriers. Despite the intrinsic structural disorder, we find that all energy landscapes collapse onto a universal barrier shape. What remains bond-specific is a single scale, the bond-jump distance, which fixes the barrier height through a cubic law. Combined with the activation statistics of shear transformations, this yields a model that predicts the plastic flow stress from independently determined bond-level quantities. Our results provide microscopic support for phenomenological models of plastic flow in glasses and suggest a route towards a quantitative description of amorphous plasticity.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-10-05 in cond-mat.dis-nn).
Categorie arXiv: Disordered Systems and Neural Networks (cond-mat.dis-nn) ; Materials Science (cond-mat.mtrl-sci); Soft Condensed Matter (cond-mat.soft).
Pagina del lavoro: https://arxiv.org/abs/2610.02454 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-10-06T09:43:48.110Z dalla pagina https://arxiv.org/catchup/cond-mat.dis-nn/2026-10-05?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).