Dipolar Cairo lattice: Geometrical frustration and short-range correlations

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

Organisaatiot

  • University of California at Santa Cruz
  • Swiss Federal Institute of Technology Zurich
  • Paul Scherrer Institute
  • University of California at Berkeley
  • Lawrence Berkeley National Laboratory
  • Harbin Institute of Technology

Kuvaus

We have studied low-energy configurations in two-dimensional arrays consisting of Ising-type dipolar coupled nanomagnets lithographically defined onto a two-dimensional Cairo lattice, thus dubbed the dipolar Cairo lattice. Employing synchrotron-based photoemission electron microscopy (PEEM), we perform real-space imaging of moment configurations achieved after thermal annealing. These states are then characterized in terms of vertex populations, spin- and emergent magnetic charge correlations, and a topology-enforced emergent ice rule. The results reveal a strong dominance of short-range correlations and the absence of long-range order, reflecting the high degree of geometrical spin frustration present in this example of an artificial frustrated spin system.

Yksityiskohdat

AlkuperäiskieliEnglanti
Artikkeli104402
Sivut1-8
JulkaisuPhysical Review Materials
Vuosikerta3
Numero10
TilaJulkaistu - 7 lokakuuta 2019
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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