{
  "abstract": "Altermagnets (AMs) combine fully compensated magnetization with momentum-dependent spin splitting, yet intrinsic altermagnetic materials exhibiting exceptional valley characteristics remain scarce. Here, we identify monolayer titanium-based chalcogenide halides, Ti$_2X_2Y$ ($X$ = F, Cl, Br, I; $Y$ = O, S, Se, Te), as a new family of two-dimensional altermagnetic valley materials. These monolayers exhibit robust $d$-wave altermagnetic order, semiconducting band gaps, and pronounced spin-polarized valley characteristics. We show that uniaxial strain breaks the valley degeneracy, inducing giant valley polarization together with a tunable piezomagnetic response. An in-plane electric field generates noncollinear spin currents, while spin--orbit coupling gives rise to the anomalous Hall effect, valley-selective linear dichroism, and the magneto-optical Kerr effect. These findings establish Ti$_2X_2Y$ monolayers as a versatile platform for exploring spin- and valley-dependent electronic, optical, and transport phenomena in two-dimensional altermagnets.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Phys. Rev. B 114, 165117 (2026)",
  "arxiv": "2608.19734",
  "author_total": 5,
  "authors": [
    {
      "name": "Ruo-Yu Ning"
    },
    {
      "name": "Zhi-Hua Yan"
    },
    {
      "name": "Jin-Yang Li"
    },
    {
      "name": "Yong-Kun Wang"
    },
    {
      "name": "Si Li"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/d92c9rw3exf4b.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2608.19734",
  "fulltext_url": null,
  "id": "d92c9rw3exf4b",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2608.19734",
  "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": null,
  "pdf_url": "https://arxiv.org/pdf/2608.19734",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-14",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/d92c9rw3exf4b.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:25Z",
      "native_id": "2608.19734",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2608.19734"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Valley- and Spin-Dependent Electronic and Transport Properties of Two-Dimensional Altermagnetic Titanium-Based Chalcogenide Halides",
  "title_text": "Valley- and Spin-Dependent Electronic and Transport Properties of Two-Dimensional Altermagnetic Titanium-Based Chalcogenide Halides",
  "type": "preprint",
  "updated_at": "2026-10-30T12:21:25Z",
  "url": "https://research.draconitic.com/paper/d92c9rw3exf4b",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/1qxd-f6dt",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}