{
  "abstract": "Bloch points are three-dimensional topological singularities in magnetization that play a key role in topological transformations of spin textures such as skyrmion creation or annihilation. While topology often enforces the existence of Bloch points in confined geometries such as cylindrical nanowires, deterministic control over their position and magnetic configuration remains challenging. Here, we demonstrate the generation of Bloch points with controlled spin texture by engineering geometrical boundary conditions in three-dimensional nanomagnets. By introducing a chirality interface between two three-dimensional double-helix nanowires of opposite handedness, forming a kinked, noncollinear structure, we impose competing topological constraints that uniquely define the magnetization configuration surrounding the Bloch point. A saturating magnetic field nucleates head-to-head or tail-to-tail domain configurations at the chirality interface, producing a Bloch-point domain wall with deterministic polarity, circulation, and helicity. This geometrical approach enables full three-dimensional control of Bloch point domain walls, allowing deterministic engineering of their spin texture and its selective coupling to current-induced Oersted fields.",
  "abstract_shown": true,
  "affiliations": [
    "Department of Physics, Loughborough University, Loughborough LE11 3TU, UK",
    "Institute of Applied Physics, TU Wien, Vienna 1040, Austria",
    "Leibniz Institute for Solid State and Materials Research Dresden, Helmholtzstr. 20, Dresden 01069, Germany",
    "Departamento de Física, Universidad de Oviedo, Oviedo 33007, Spain",
    "CINN (CSICUniversidad de Oviedo), El Entrego 33940, Spain",
    "ALBA Synchrotron Light Source, Cerdanyola del Valles, Barcelona 08290, Spain",
    "Institute of Solid State and Materials Physics, Technische Universität Dresden, Dresden 01069, Germany",
    "Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439 United States",
    "Laboratoire Albert Fert, CNRS, Thales, Palaiseau 91767, France",
    "Max Planck Institute for Chemical Physics of Solids, Dresden 01187, Germany",
    "Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States",
    "Physics Department, University of California Santa Cruz, Santa Cruz, California 95064, United States",
    "Synchrotron SOLEIL, Saint-Aubin 91190, France",
    "Faculty of Physics, University of Vienna, Vienna 1090, Austria"
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 19,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Naëmi Leo",
      "orcid": "0000-0002-0828-6889"
    },
    {
      "affs": [
        2
      ],
      "name": "Daniel Wolf",
      "orcid": "0000-0001-5000-8578"
    },
    {
      "affs": [
        3,
        4,
        5
      ],
      "name": "Alicia Estela Herguedas-Alonso"
    },
    {
      "affs": [
        2,
        6
      ],
      "name": "Oleksandr Zaiets"
    },
    {
      "affs": [
        1
      ],
      "name": "Jakub Jurczyk"
    },
    {
      "affs": [
        1
      ],
      "name": "Takeaki Gokita"
    },
    {
      "affs": [
        7
      ],
      "name": "John Fullerton",
      "orcid": "0000-0002-7527-7034"
    },
    {
      "affs": [
        8
      ],
      "name": "Dedalo Sanz-Hernandez",
      "orcid": "0000-0002-5552-8836"
    },
    {
      "affs": [
        9
      ],
      "name": "Claire Donnelly",
      "orcid": "0000-0002-9942-2419"
    },
    {
      "affs": [
        5
      ],
      "name": "Andrea Sorrentino",
      "orcid": "0000-0002-3235-8950"
    },
    {
      "affs": [
        5
      ],
      "name": "Eva Pereiro"
    },
    {
      "affs": [
        5
      ],
      "name": "Lucia Aballe",
      "orcid": "0000-0003-1810-8768"
    },
    {
      "affs": [
        10,
        11
      ],
      "name": "Peter Fischer",
      "orcid": "0000-0002-9824-9343"
    },
    {
      "affs": [
        12
      ],
      "name": "Rachid Belkhou"
    },
    {
      "affs": [
        13
      ],
      "name": "Claas Abert"
    },
    {
      "affs": [
        13
      ],
      "name": "Dieter Suess"
    },
    {
      "affs": [
        2,
        6
      ],
      "name": "Axel Lubk",
      "orcid": "0000-0003-2698-8806"
    },
    {
      "affs": [
        3,
        4
      ],
      "name": "Aurelio Hierro-Rodriguez",
      "orcid": "0000-0001-6600-7801"
    },
    {
      "affs": [
        1
      ],
      "name": "Amalio Fernández-Pacheco",
      "orcid": "0000-0002-3862-8472"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/953ehkyr5t8cm.bib",
  "cited_by": 0,
  "doi": "10.1021/acsnano.6c09658",
  "fulltext_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC13718616/",
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  "issns": [
    "1936-0851",
    "1936-086X"
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  "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,
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      "3107|Magnetic properties of thin films"
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  "pdf_url": "https://pubs.acs.org/ancac3/article-pdf/doi/10.1021/acsnano.6c09658/68843473/acsnano.6c09658.pdf",
  "pmcid": "PMC13718616",
  "pmid": "42937573",
  "published": "2026-10-13",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/953ehkyr5t8cm.ris",
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      "first_seen": "2026-11-02T12:22:36Z",
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  "subjects": [
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      "origin": "openalex:3107|Magnetic properties of thin films",
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  "title": "Generation of Bloch Points with Controlled Spin Texture Using Geometrical Boundary Conditions",
  "title_text": "Generation of Bloch Points with Controlled Spin Texture Using Geometrical Boundary Conditions",
  "type": "peer-reviewed",
  "updated_at": "2026-11-02T12:22:36Z",
  "url": "https://research.draconitic.com/paper/953ehkyr5t8cm",
  "venue": "ACS Nano",
  "versions": [
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      "doi": "10.48550/arxiv.2605.29672",
      "pid": "96m54fy622bb8",
      "relation": "preprint",
      "title": "Generation of Bloch Points with Controlled Spin Texture Using Geometrical Boundary Conditions",
      "venue": "arXiv"
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  ]
}