Fingering Instability of Dislocations and Related Defects
Ming Li, Brian B. Smith, Robin L. B. Selinger
Abstract
We identify a fundamental morphological instability of mobile dislocations in crystals and related line defects. A positive gradient in the local driving force along the direction of defect motion destabilizes long-wavelength vibrational modes, producing a ``fingering'' pattern. The minimum unstable wavelength scales as the inverse square root of the force gradient. We demonstrate the instability's onset in simulations of a screw dislocation in Al (via molecular dynamics) and of a vortex in a 3-d XY ``rotator'' model.
Create a lesson
Related papers
Real-space obstruction control of the shift current in two-dimensional Quantum Spin Hall insulators
Michele Bagaglini, Mattia Iannetti, Jonas Erhardt et al.
Interlayer Registry Controls Polar Topology in Twisted Bilayer h-BN
Di Fan, Changming Ke, Shi Liu
Theoretical Investigation of Oxygen-Vacancy Diffusion in SrTiO3 using Neural Network Potentials
Kazutaka Nishiguchi, Ryota Yamamoto, Seiichiro Ten-no
Modelling the dynamics of the martensitic transformation in Ni2MnGa with machine-learning force-fields
Markus E. Gruner, Yulia Klunnikova, Mike J. Bruckhoff et al.
Decoupling Trap States in Amorphous Oxide Semiconductor Transistor Using a Conductive-Semiconducting-Conductive MOS Structure
Kai Chen, Wei Zhang, Xuanyao Fong et al.
Angle-Resolved Photoemission as a Sensitive Probe of Surface Quality: Sputtered versus Annealed Cu(001)
Hyeonhee Na, Jeonghwan Oh, Jinju Lee et al.