Incollection,
Statistical properties of dislocation systems
Abstract Book of the XXIII IUPAP International Conference on Statistical Physics, Genova, Italy, (9-13 July 2007)
Abstract
As dislocations are the carriers of plastic deformation is crystalline
materials, and they interact by long range forces, their collective
properties are an important and difficult area of classical many-body
problems. Two main results for linear, i.e., 2-dimensional edge dislocation systems are highlighted: (i) We resolve the effect of Debye-like screening by a
background of dislocations, give the induced polarization analytically
and verify by simulation the screening through the correlation function of
dislocations 1. (ii) In various dislocation ensembles we show by
simulation that the dynamics bears a strong resemblance to that of
glasses, in that time translation invariance is violated. Connection
is found between the patterns the dislocations form and the type of
glass they resemble, both depending on the anisotropy of the dislocation
mobility 2.
1) I. Groma, G. Gyorgyi, B. Kocsis: Debye Screening of Dislocations,
Physical Review Letters, vol. 96, 165503 (2006)\\
2) B. Bako, I. Groma, G. Gyorgyi, G. Zimanyi: Dislocation Glasses: Aging
during Relaxation and Coarsening, Physical Review Letters, vol. 98,
075701 (2007)
