Dipolar Cairo lattice: Geometrical frustration and short-range correlations

Michael Saccone, Kevin Hofhuis, Yen Lin Huang, Scott Dhuey, Zuhuang Chen, Andreas Scholl, Rajesh V. Chopdekar, Sebastiaan Van Dijken, Alan Farhan

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)
44 Downloads (Pure)

Abstract

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.

Original languageEnglish
Article number104402
Pages (from-to)1-8
JournalPhysical Review Materials
Volume3
Issue number10
DOIs
Publication statusPublished - 7 Oct 2019
MoE publication typeA1 Journal article-refereed

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