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Dynamic avalanches in complex materials arise from element flipping dynamics, not just static interactions. Researchers controlled these dynamics in metamaterials to direct material behavior and create sequential functionalities.

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Area of Science:

  • Physics
  • Materials Science
  • Complex Systems

Background:

  • Avalanches are complex phenomena involving cooperative rearrangements of local elements.
  • Existing models often fail to capture the dynamic nature of these events.
  • Hysteresis in local elements plays a key role in avalanche initiation.

Purpose of the Study:

  • To investigate the role of flipping dynamics and race conditions in material avalanches.
  • To demonstrate the realization and control of dynamic avalanches in metamaterials.
  • To introduce dynamic design principles for materials with targeted functionalities.

Main Methods:

  • Utilized metamaterials with precisely controlled element flipping times.
  • Studied the cooperative flipping dynamics of hysteretic local elements.
  • Analyzed the emergence of dynamic avalanches and race conditions.

Main Results:

  • Dynamic avalanches, driven by flipping dynamics and race conditions, were observed.
  • Static models were insufficient to capture the observed avalanche behavior.
  • Metamaterials allowed for modification, promotion, and direction of avalanche behavior by controlling flipping times.

Conclusions:

  • Internal dynamics are crucial for understanding complex material behavior.
  • Dynamic design principles enable the creation of materials with tunable and sequential functionalities.
  • This work opens new avenues for designing advanced materials based on dynamic avalanche control.