{
  "abstract": "Altermagnets have emerged as a new class of magnetic materials that combine spin-split electronic bands with zero net magnetization. Extending this paradigm to classical-wave systems has, however, been fundamentally challenging because conventional realizations require broken time-reversal symmetry (TRS). Here, we overcome this limitation by introducing a pseudospin degree of freedom and constructing a pseudo-time-reversal operator that faithfully reproduces the action of its physical counterpart while preserving actual TRS. Building on this framework, we theoretically propose and experimentally realize the first time-reversal-invariant altermagnetic acoustic crystal. Acoustic measurements directly reveal pseudospin-dependent band splitting--a defining hallmark of altermagnetism--under strictly TRS-preserving conditions. Moreover, the altermagnetic acoustic crystal exhibits sublattice-pseudospin locking, enabling flexible control over acoustic pseudospin splitting and filtering. Our work establishes acoustic crystals as a versatile platform for exploring altermagnetic physics and opens new avenues for spin-inspired wave manipulation in nonmagnetic devices.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2608.08827",
  "author_total": 6,
  "authors": [
    {
      "name": "Tianzhi Xia"
    },
    {
      "name": "Han-Rong Xia"
    },
    {
      "name": "Jinglin Liu"
    },
    {
      "name": "Xiying Fan"
    },
    {
      "name": "Zebin Zhu"
    },
    {
      "name": "Zhen Gao"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/0zmw3s9hjfe5s.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2608.08827",
  "fulltext_url": null,
  "id": "0zmw3s9hjfe5s",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2608.08827",
  "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",
      "physics.app-ph"
    ],
    [
      "arxiv",
      "physics.class-ph"
    ],
    [
      "openalex",
      "3107|Topological Materials and Phenomena"
    ]
  ],
  "openalex": "W7202175638",
  "pdf_url": "https://arxiv.org/pdf/2608.08827",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-29",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/0zmw3s9hjfe5s.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:36:22Z",
      "native_id": "2608.08827",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2608.08827"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.app-ph",
      "subfield": "applied-instrumentation"
    },
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mes-hall",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Time-Reversal-Invariant Altermagnetic Acoustic Crystals",
  "title_text": "Time-Reversal-Invariant Altermagnetic Acoustic Crystals",
  "type": "preprint",
  "updated_at": "2026-11-01T12:20:44Z",
  "url": "https://research.draconitic.com/paper/0zmw3s9hjfe5s",
  "venue": "arXiv",
  "versions": []
}