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Phys Rev Lett. 2006 Apr 28;96(16):165503. doi: 10.1103/PhysRevLett.96.165503. Epub 2006 Apr 28.

Debye screening of dislocations.

Physical review letters

I Groma, G Györgyi, B Kocsis

Affiliations

  1. Department of General Physics, Eötvös University, 1117 Budapest, Pázmány sétány 1/a, Hungary. [email protected]

PMID: 16712246 DOI: 10.1103/PhysRevLett.96.165503

Abstract

Debye-like screening by edge dislocations of some externally given stress is studied by means of a variational approach to coarse grained field theory. Explicitly given are the force field and the induced geometrically necessary dislocation (GND) distribution, in the special case of a single glide axis in 2D, for (i) a single edge dislocation and (ii) a dislocation wall. Numerical simulation demonstrates that the correlation in relaxed dislocation configurations is in good agreement with the induced GND in case (i). Furthermore, the result (ii) well predicts the experimentally observed decay length for the GND developing close to grain boundaries.

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