Journal
PHYSICAL REVIEW LETTERS
Volume 117, Issue 16, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.117.168001
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Funding
- ERC StG [335040]
- Mineco [FIS2013-41144-P]
- AGAUR [2014SGR878]
- European Research Council (ERC) [335040] Funding Source: European Research Council (ERC)
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We study the defect dynamics in a colloidal spin ice system realized by filling a square lattice of topographic double well islands with repulsively interacting magnetic colloids. We focus on the contraction of defects in the ground state, and contraction or expansion in a metastable biased state. Combining real-time experiments with simulations, we prove that these defects behave like emergent topological monopoles obeying a Coulomb law with an additional line tension. We further show how to realize a completely resettable NOR gate, which provides guidelines for fabrication of nanoscale logic devices based on the motion of topological magnetic monopoles.
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