Title:
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Defect Dynamics in Artificial Colloidal Ice: Real-Time Observation, Manipulation, and Logic Gate
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Author:
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Loehr, Johannes; Ortiz-Ambriz, Antonio; Tierno, Pietro
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Other authors:
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Universitat de Barcelona |
Abstract:
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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. |
Subject(s):
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-Col·loides -Polímers -Matèria condensada tova -Colloids -Polymers -Soft condensed matter |
Rights:
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(c) American Physical Society, 2016
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Document type:
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Article Article - Published version |
Published by:
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American Physical Society
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