{
  "abstract": "Light-driven control of material symmetry enables the engineering of phenomena forbidden in equilibrium. Although electromagnetic fields have been used to break time-reversal symmetry, its dynamic control on ultrafast timescales in nonmagnetic insulating oxides remains virtually unexplored. Here, we demonstrate simultaneous magnetic symmetry lowering and timereversal-symmetry breaking in cubic SrTiO3 driven by an off-resonant, elliptically polarized THz pulse. Second harmonic generation (SHG) polarimetry reveals emergent SHG circular dichroism inconsistent with third-order nonlinear processes under cubic m3m symmetry. The SHG polar patterns exhibit mirror-symmetry breaking, indicating a transient reduction to tetragonal 4/mm'm' magnetic symmetry. Furthermore, the SHG response scales linearly with the angular momentum of THz pulse, providing direct evidence for THz-field-induced timereversal-symmetry breaking. These results establish a direct pathway for ultrafast symmetry control in non-magnetic oxides, enabling dynamic manipulation of emergent phases on ultrafast timescales.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.09497",
  "author_total": 6,
  "authors": [
    {
      "name": "In Hyeok Choi"
    },
    {
      "name": "Sergei Urazhdin"
    },
    {
      "name": "Shivasheesh Varshney"
    },
    {
      "name": "Seung Gyo Jeong"
    },
    {
      "name": "Bharat Jalan"
    },
    {
      "name": "Keith A. Nelson"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/fhadmetqv72yc.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.09497",
  "fulltext_url": null,
  "id": "fhadmetqv72yc",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.09497",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mtrl-sci"
    ],
    [
      "openalex",
      "2505|Electronic and Structural Properties of Oxides"
    ]
  ],
  "openalex": "W7212162433",
  "pdf_url": "https://arxiv.org/pdf/2609.09497",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-23",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/fhadmetqv72yc.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:56Z",
      "native_id": "2609.09497",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.09497"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Light-Driven Ultrafast Control of Time-Reversal Symmetry in SrTiO3",
  "title_text": "Light-Driven Ultrafast Control of Time-Reversal Symmetry in SrTiO3",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:56Z",
  "url": "https://research.draconitic.com/paper/fhadmetqv72yc",
  "venue": "arXiv",
  "versions": []
}