{
  "abstract": "Half-Heusler alloys provide a versatile platform for tuning electronic and thermal transport through chemical substitution. Here, we investigate the thermoelectric and magnetotransport properties of spark-plasma-sintered YNi_{0.5}Pt_{0.5}Bi. Partial substitution of Ni by Pt drives YNiBi toward semimetallic transport, characterized by hole-dominated conduction, a low Hall carrier concentration of $\\mathrm{1.9 \\times 10^{19} cm^{-3}}$, and a sizeable nonsaturating magnetoresistance of 18$\\%$ at 300 K under 14 T. Compared with YNiBi, Pt alloying increases the room-temperature Seebeck coefficient from approximately 90 to 130 $\\mathrm{μV K^{-1}}$, while reducing the thermal conductivity to 3.15 $\\mathrm{W m^{-1} K^{-1}}$. Single-parabolic-band analysis indicates an enhanced carrier effective mass, resulting in a room-temperature power factor of 13.7 $\\mathrm{μW cm^{-1} K^{-2}}$ and a figure of merit ($zT$= 0.13). First-principles calculations further show a Pt-induced closing of the electronic band gap and a low density of states near the Fermi level, consistent with the experimentally observed semimetal-like transport. These results demonstrate that Ni/Pt alloying provides an effective route for simultaneously tuning the electronic, magnetotransport, and thermoelectric properties of YNiBi-based half-Heusler compounds.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.22253",
  "author_total": 14,
  "authors": [
    {
      "name": "Vikas Chahar"
    },
    {
      "name": "Shivam Rathod"
    },
    {
      "name": "Lankun Wang"
    },
    {
      "name": "Sneh"
    },
    {
      "name": "Shubhadeep Bej"
    },
    {
      "name": "Divya Prakash Dubey"
    },
    {
      "name": "Dinesh Dixit"
    },
    {
      "name": "Abdelmoneim Elkhouly"
    },
    {
      "name": "Raúl Cardoso-Gil"
    },
    {
      "name": "Zihang Liu"
    },
    {
      "name": "Xiao Xu"
    },
    {
      "name": "Rie Y. Umetsu"
    },
    {
      "name": "Ratnamala Chatterjee"
    },
    {
      "name": "Kaustuv Manna"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/54crqt0zyxm4h.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.22253",
  "fulltext_url": null,
  "id": "54crqt0zyxm4h",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.22253",
  "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"
    ],
    [
      "arxiv",
      "cond-mat.str-el"
    ],
    [
      "openalex",
      "2505|Advanced Thermoelectric Materials and Devices"
    ]
  ],
  "openalex": "W7222402653",
  "pdf_url": "https://arxiv.org/pdf/2610.22253",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-15",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/54crqt0zyxm4h.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:50Z",
      "native_id": "2610.22253",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.22253"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Pt-induced semimetallic transport and enhanced thermoelectric response in the half-Heusler alloy YNi_{0.5}Pt_{0.5}Bi",
  "title_text": "Pt-induced semimetallic transport and enhanced thermoelectric response in the half-Heusler alloy YNi_{0.5}Pt_{0.5}Bi",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:50Z",
  "url": "https://research.draconitic.com/paper/54crqt0zyxm4h",
  "venue": "arXiv",
  "versions": []
}