{
  "abstract": "Vortex pinning plays a crucial role in determining properties of type-II superconductors. For example, it governs the irreversible magnetic response as well as dissipation caused by vortex motion. Here, we study vortex pinning in the three-dimensional oxide superconductor Ba1-xKxBiO3 using ultra-high-resolution magneto-optical Kerr effect (MOKE) and detailed magnetization measurements. We find that the zero-field MOKE signal in the superconducting state exhibits a pronounced magnetic-history dependence. This behavior closely resembles the remanent magnetization caused by trapped vortices. Furthermore, we demonstrate that the observed evolution of the MOKE signals is well described by Bean's critical-state model for trapped vortices. Our results establish MOKE as a viable optical and mesoscopic probe of vortex pinning in type-II superconductors, providing a new complementary approach to investigate mixed-state phenomena. We also find that the training-field dependence of the MOKE is linear near zero training field, without any anomalies indicative of spontaneous time-reversal-symmetry breaking in an unconventional superconducting state. Our study defines a clear protocol to distinguish vortex-induced MOKE responses from those associated with a time-reversal-symmetry broken superconducting order parameter.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: J. Phys. Soc. Jpn. 95, 114701 (2026)",
  "arxiv": "2606.10300",
  "author_total": 11,
  "authors": [
    {
      "name": "Soichiro Yamane"
    },
    {
      "name": "Sota Nakamura"
    },
    {
      "name": "Atsutoshi Ikeda"
    },
    {
      "name": "Dayu Zhai"
    },
    {
      "name": "Siddarth Gorregattu"
    },
    {
      "name": "Xing He"
    },
    {
      "name": "Sudarshan Sharma"
    },
    {
      "name": "Yipeng Cai"
    },
    {
      "name": "Yasutomo J. Uemura"
    },
    {
      "name": "Martin Greven"
    },
    {
      "name": "Shingo Yonezawa"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/6en6gzwvvbw9r.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.10300",
  "fulltext_url": null,
  "id": "6en6gzwvvbw9r",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.10300",
  "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"
    ],
    [
      "arxiv",
      "cond-mat.supr-con"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2606.10300",
  "pmcid": null,
  "pmid": null,
  "published": "2026-06-09",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/6en6gzwvvbw9r.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:26:45Z",
      "native_id": "2606.10300",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.10300"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Vortex pinning of Ba$_{0.62}$K$_{0.38}$BiO$_3$ investigated by magneto-optical Kerr-effect and magnetization measurements",
  "title_text": "Vortex pinning of Ba_0.62K_0.38BiO_3 investigated by magneto-optical Kerr-effect and magnetization measurements",
  "type": "preprint",
  "updated_at": "2026-10-30T12:26:45Z",
  "url": "https://research.draconitic.com/paper/6en6gzwvvbw9r",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.7566/jpsj.95.114701",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}