Dipolar Cairo lattice: Geometrical frustration and short-range correlations
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2019-10-07
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en
Pages
1-8
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Physical Review Materials, Volume 3, issue 10
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.Description
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Saccone, M, Hofhuis, K, Huang, Y L, Dhuey, S, Chen, Z, Scholl, A, Chopdekar, R V, Van Dijken, S & Farhan, A 2019, ' Dipolar Cairo lattice : Geometrical frustration and short-range correlations ', Physical Review Materials, vol. 3, no. 10, 104402, pp. 1-8 . https://doi.org/10.1103/PhysRevMaterials.3.104402
