Displacement field of a screw dislocation in a 〈 011 〉 Cu nanowire: An atomistic study - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2013

Displacement field of a screw dislocation in a 〈 011 〉 Cu nanowire: An atomistic study

Résumé

By performing atomistic calculations with a tight-binding potential, we study the displacement field induced by a screw dislocation lying along a free 011 Cu cylindrical nanowire. For this anisotropic orientation that is often encountered experimentally, we show that the displacement field u z along the nanowire can be seen as the superposition of three different fields: the screw dislocation field in an infinite medium, the warping displacement field caused by the so-called Eshelby twist, and an additional image field induced by the free surfaces. A Fourier series analysis of this latter image displacement and stress fields is given. For a circular cross section of the wire, this image field corresponds mainly to an additional warping displacement u z ∝ xy. The dissociation mechanism of the dislocation into partials and the surface stress effects being also captured in our simulations, the present study enables one to quantify the various contributions to the formation of the x-ray diffractograms.
Fichier principal
Vignette du fichier
displacementFieldOfAScrewDislocationInA011CuNanoWire_anAtomisticStudy_Gailhanou_2013PhysRevB.88.224101.pdf (3.86 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-01726918 , version 1 (08-03-2018)

Identifiants

Citer

Marc Gailhanou, Jean-Marc Roussel. Displacement field of a screw dislocation in a 〈 011 〉 Cu nanowire: An atomistic study. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2013, 88 (22), pp.224101. ⟨10.1103/PhysRevB.88.224101⟩. ⟨hal-01726918⟩
88 Consultations
316 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More