Emergent long-tailed dynamics in spin ice.

High-frequency driven spin-ice dynamics show nonergodic monopole behavior with power-law-distributed trapping times and long tails that persist even without driving.

• Why it matters: Long-tail, nonergodic dynamics challenge standard expectations for driven magnetic systems and clarify how monopole interactions shape rare-event statistics.
• What they did: A classical spin model suppresses drive-induced heating at high driving frequencies and tracks monopole trapping times, while intermediate frequencies lead to infinite-temperature heating with long-tailed, realization-sensitive heating times.
• The result: An effective short-range attractive interaction between monopoles is linked to long-tailed distributions in both monopole trapping and heating dynamics.

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