{
  "abstract": "Driven by escalating demands from emerging applications and inherent limitations of current technologies, terahertz (THz) science has surged as a cornerstone for 6G+ communication systems and magnonic computation. Phase shifters, essential for THz wave manipulation, drive communication advances, while magnons enable ultrafast, energy‐efficient processing. Ideally, a multifunctional material co‐hosting both would integrate these fields towards lab‐on‐a‐chip applications; yet, no such experimental realization exists. Herein, a novel platform is presented to integrate intrinsic THz phase shifting and spin excitations within a single material system. Fe 4 Nb 2 O 9 , selected as a model compound, demonstrates a remarkable intrinsic phase‐shift of 304.7° at around 0.5 THz in the temperature range of 30–93 K. This gigantic effect either matches or surpasses the existing metasurface‐based free‐space THz phase shifters − with a correlated phase‐frequency relationship across a wide sub‐THz bandwidth (0.1 to 0.56 THz). The experimental results, corroborated by theoretical lattice vibration calculations, attribute the observed THz phase‐shift to dielectric modulation in Fe 4 Nb 2 O 9 . Complementing these findings, two distinct THz magnon excitations were detected above 0.56 THz in its antiferromagnetic phase. This unique coexistence of phase modulation and spin dynamics positions Fe 4 Nb 2 O 9 as a paradigmatic multifunctional material‐a model compound for next‐generation miniaturized THz communication and computation platforms.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 11,
  "authors": [
    {
      "name": "Brijesh Singh Mehra"
    },
    {
      "name": "Karan Datt Sharma"
    },
    {
      "name": "Sanjeev Kumar"
    },
    {
      "name": "Gaurav Dubey"
    },
    {
      "name": "Mitanshi Gupta"
    },
    {
      "name": "Ravi Shankar Singh"
    },
    {
      "name": "Dibakar Roy Chowdhury"
    },
    {
      "name": "Christine Martin"
    },
    {
      "name": "Antoine Maignan"
    },
    {
      "name": "Kiran Singh"
    },
    {
      "name": "Dhanvir Singh Rana"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/aa14em18e9zsd.bib",
  "cited_by": 1,
  "doi": "10.1002/advs.75555",
  "fulltext_url": null,
  "id": "aa14em18e9zsd",
  "issns": [
    "2198-3844"
  ],
  "landing_url": "https://hal.science/hal-05843602v1",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.phys"
    ],
    [
      "openalex",
      "2208|Terahertz technology and applications"
    ]
  ],
  "openalex": "W7161025308",
  "pdf_url": "https://hal.science/hal-05843602/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-05-13",
  "publisher": "Wiley Open Access",
  "ris": "https://research.draconitic.com/paper/aa14em18e9zsd.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:03Z",
      "native_id": "hal-05843602",
      "source": "hal",
      "url": "https://hal.science/hal-05843602v1"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "hal:0.phys",
      "subfield": "general"
    }
  ],
  "title": "Concurrent Terahertz Spin Excitations and Phase Shift Control in Fe 4 Nb 2 O 9 : A Material for Synergizing Computation and Communication Technologies",
  "title_text": "Concurrent Terahertz Spin Excitations and Phase Shift Control in Fe 4 Nb 2 O 9 : A Material for Synergizing Computation and Communication Technologies",
  "type": "peer-reviewed",
  "updated_at": "2026-10-31T12:20:56Z",
  "url": "https://research.draconitic.com/paper/aa14em18e9zsd",
  "venue": "Advanced Science",
  "versions": []
}