Frictionless Motion of Lattice Defects

Area of Science:

• Solid-state physics
• Materials science
• Acoustics

Background:

• Fast crystalline defects dissipate energy via resonant interaction with the lattice.
• Understanding and controlling this dissipation is crucial for material properties and mechanical information transfer.

Purpose of the Study:

• To demonstrate that acoustic sources can eliminate friction for crystalline defects.
• To explore applications in metamaterials for mechanical information transmission.

Main Methods:

• Theoretical modeling of energy dissipation in crystalline defects.
• Simulation of resonant interactions between defect cores and lattice.
• Analysis of acoustic control protocols on defect mobility.

Main Results:

• Effective friction for crystalline defects can be reduced to zero using boundary-acoustic sources.
• Control protocols were developed for dislocations, cracks, and domain walls.
• Dissipation-free defect mobility was theoretically achieved.

Conclusions:

• Acoustic manipulation offers a method to eliminate energy dissipation in crystalline defects.
• This approach facilitates the design of metamaterials for advanced mechanical signal processing.