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Approaching the Topological Low-Energy Physics of the F Model in a Two-Dimensional Magnetic Lattice.
Schánilec, V; Brunn, O; Horácek, M; Krátký, S; Meluzín, P; Sikola, T; Canals, B; Rougemaille, N.
Afiliação
  • Schánilec V; Université Grenoble Alpes, CNRS, Grenoble INP, Institut NEEL, 38000 Grenoble, France.
  • Brunn O; Central European Institute of Technology, CEITEC BUT, Brno University of Technology, Purkynova 123, Brno 612 00, Czech Republic.
  • Horácek M; Université Grenoble Alpes, CNRS, Grenoble INP, Institut NEEL, 38000 Grenoble, France.
  • Krátký S; Institute of Scientific Instruments of the Czech Academy of Sciences, Královopolská 147, 612 64 Brno, Czech Republic.
  • Meluzín P; Institute of Physical Engineering, Brno University of Technology, Technická 2, 616 69 Brno, Czech Republic.
  • Sikola T; Institute of Scientific Instruments of the Czech Academy of Sciences, Královopolská 147, 612 64 Brno, Czech Republic.
  • Canals B; Institute of Scientific Instruments of the Czech Academy of Sciences, Královopolská 147, 612 64 Brno, Czech Republic.
  • Rougemaille N; Institute of Scientific Instruments of the Czech Academy of Sciences, Královopolská 147, 612 64 Brno, Czech Republic.
Phys Rev Lett ; 129(2): 027202, 2022 Jul 08.
Article em En | MEDLINE | ID: mdl-35867462
We demonstrate that the physics of the F model can be approached very closely in a two-dimensional artificial magnetic system. Faraday lines spanning across the lattice and carrying a net polarization, together with chiral Faraday loops characterized by a zero magnetic susceptibility, are imaged in real space using magnetic force microscopy. Our measurements reveal the proliferation of Faraday lines and Faraday loops as the system is brought from low- to high-energy magnetic configurations. They also reveal a link between the Faraday loop density and icelike spin-spin correlations in the magnetic structure factor. Key for this Letter, the density of topological defects remains small, on the order of 1% or less, and negligible compared to the density of Faraday loops. This is made possible by replacing the spin degree of freedom used in conventional lattices of interacting nanomagnets by a micromagnetic knob, which can be finely tuned to adjust the vertex energy directly, rather than modifying the two-body interactions.

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Prognostic_studies Idioma: En Revista: Phys Rev Lett Ano de publicação: 2022 Tipo de documento: Article País de afiliação: França

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Prognostic_studies Idioma: En Revista: Phys Rev Lett Ano de publicação: 2022 Tipo de documento: Article País de afiliação: França