Stability of a Screw Dislocation in a ⟨ 011 ⟩ Copper Nanowire

Jean-Marc Roussel (1) , Marc Gailhanou (1)

1 IM2NP - Institut des Matériaux, de Microélectronique et des Nanosciences de Provence

The stability of a screw dislocation in a free h011i copper nanowire is investigated using atomistic calculations. This study reveals a strong anisotropy of the Eshelby potential well (EPW) that traps the dislocation. Moreover the depth of the EPW is found to vanish when the radius of the nanowire decreases. It is demonstrated that this behavior is due to the dissociated state of the dislocation.

Domaines: Mécanique des solides [physics.class-ph]; Science des matériaux [cond-mat.mtrl-sci]

Jean-Marc Roussel, Marc Gailhanou. Stability of a Screw Dislocation in a ⟨ 011 ⟩ Copper Nanowire. Physical Review Letters, 2015, 115 (7), pp.075503. ⟨10.1103/PhysRevLett.115.075503⟩. ⟨hal-01729734⟩