Topological Kinetics in a Vertex-Frustrated Artificial Spin Ice Nanomagnet Array

ORAL

Abstract

We have experimentally investigated and imaged how the topology of a frustrated artificial spin ice nanomagnet array can affect and constrain its kinetics. Studying vertex-frustrated Santa Fe artificial spin ice, in which magnetic excitations are correlated in thermally active one-dimensional emergent strings, we imaged the thermally-driven motion of these emergent string excitations in real time. At high temperatures, the string kinetics include topologically complex changes, which are highly constrained at lower temperatures. This system provides an unusually accessible venue in which to study the effects of topology on ergodicity through direct measurement of the thermal kinetics.

*Work at Yale University was funded by the US Department of Energy, Office of Basic Energy Sciences, Materials Sciences and Engineering Division under Grant No. DE-SC0020162. This research used resources of the Advanced Light Source, a DOE Office of Science User Facility under contract no. DE-AC02-05CH11231. Work at the University of Minnesota was supported by NSF through Grant No. DMR-2103711. Work at Los Alamos National Laboratory was carried out under the auspices of the US Department of Energy through Los Alamos National Laboratory, operated by Triad National Security, LLC (Contract No. 892333218NCA000001) and financed by DoE LDRD.

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Publication: under review at Science (2022)

Presenters

  • Ioan-Augustin Chioar

    • Yale University

Authors

  • Ioan-Augustin Chioar

    • Yale University

  • Xiaoyu Zhang

    • Yale University

  • Grant Fitez

    • Yale University

  • Shayaan Subzwari

    • Yale University

  • Nicholas S Bingham

    • University of Maine

  • Hilal Saglam

    • Yale University

  • Justin Ramberger

    • University of Minnesota

  • Chris Leighton

    • University of Minnesota

  • Cristiano Nisoli

    • Los Alamos Natl Lab

  • Peter Schiffer

    • Yale University