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Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
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Encoding of memory in sheared amorphous solids.

Davide Fiocco1, Giuseppe Foffi2, Srikanth Sastry3

  • 1Institute of Theoretical Physics (ITP), Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.

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Summary
This summary is machine-generated.

Amorphous solids and spin models can store memory of deformation amplitude using athermal oscillatory shear. This noise-free method allows for multiple persistent memories by leveraging plastic deformations and limit cycles.

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Area of Science:

  • Condensed matter physics
  • Statistical mechanics
  • Materials science

Background:

  • Amorphous solids and spin models possess deformable energy landscapes.
  • Understanding memory encoding in physical systems is crucial for developing novel data storage technologies.

Purpose of the Study:

  • To demonstrate memory encoding in amorphous solids and spin models via athermal oscillatory shear.
  • To investigate the mechanism of persistent memory storage and retrieval.

Main Methods:

  • Subjecting model amorphous solids and spin models to athermal oscillatory shear deformations.
  • Analyzing the system's response to varying deformation amplitudes below a localization threshold.
  • Investigating the role of plastic deformations and limit cycles.

Main Results:

  • Memory of deformation amplitude is retained in both systems below a localization threshold.
  • Multiple persistent memories can be stored using this athermal, noise-free protocol.
  • Memory storage is linked to plastic deformations and limit cycles with avalanche statistics.

Conclusions:

  • Athermal oscillatory shear provides a viable mechanism for encoding persistent memory in amorphous solids and spin models.
  • The findings suggest potential applications in novel memory devices and understanding complex system dynamics.