Topological kinetic crossover in a nanomagnet array

Xiaoyu Zhang, Grant Fitez, Shayaan Subzwari, Nicholas S. Bingham, Ioan Augustin Chioar, Hilal Saglam, Justin Ramberger, Chris Leighton, Cristiano Nisoli, Peter Schiffer

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Ergodic kinetics, which are critical to equilibrium thermodynamics, can be constrained by a system’s topology. We studied a model nanomagnetic array in which such constraints visibly affect the behavior of the magnetic moments. In this system, magnetic excitations connect into thermally active one-dimensional strings whose motion can be imaged in real time. At high temperatures, our data showed the merging, breaking, and reconnecting of strings, resulting in the system transitioning between topologically distinct configurations. Below a crossover temperature, the string motion is dominated by simple changes in length and shape. In this low-temperature regime, the system is energetically stable because of its inability to explore all possible topological configurations. This kinetic crossover suggests a generalizable conception of topologically broken ergodicity and limited equilibration.

Original languageEnglish (US)
JournalScience
Volume380
Issue number6644
DOIs
StatePublished - May 5 2023

Bibliographical note

Publisher Copyright:
Copyright © 2023 the authors, some rights reserved.

PubMed: MeSH publication types

  • Journal Article

Fingerprint

Dive into the research topics of 'Topological kinetic crossover in a nanomagnet array'. Together they form a unique fingerprint.

Cite this