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 journalArticlepeer-review

17 Scopus citations


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
Number of pages8
JournalPhysical Review Materials
Issue number10
StatePublished - 7 Oct 2019


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