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Dipolar Cairo lattice: Geometrical frustration and short-range correlations

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Saccone Michael, Hofhuis Kevin, Huang Yen-Lin, Dhuey Scott, Chen Zuhuang, Scholl Andreas, Chopdekar Rajesh V., van Dijken Sebastiaan, Farhan Alan,
Project Emergent Phenomena in Artificial Frustrated Systems and Oxide Superlattices
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Original article (peer-reviewed)

Journal Physical Review Materials
Volume (Issue) 3(10)
Page(s) 104402 - 104402
Title of proceedings Physical Review Materials
DOI 10.1103/physrevmaterials.3.104402

Open Access

URL https://research.aalto.fi/files/38073687/PhysRevMaterials.3.104402_1.pdf
Type of Open Access Green OA Embargo (Freely available via Repository after an embargo)

Abstract

We have studied low-energy configurations in two-dimensional arrays consisting of Ising-type dipolar couplednanomagnets 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 ofmoment configurations achieved after thermal annealing. These states are then characterized in terms of vertexpopulations, spin- and emergent magnetic charge correlations, and a topology-enforced emergent ice rule. Theresults reveal a strong dominance of short-range correlations and the absence of long-range order, reflecting thehigh degree of geometrical spin frustration present in this example of an artificial frustrated spin system.
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