  Molecular dynamics simulations on tensile deformation of initially defect
free single crystal copper nanowire oriented in <001>{100} has been carried out
at 10 K under adiabatic and isothermal loading conditions. The tensile
behaviour was characterized by sharp rise in stress in elastic regime followed
by sudden drop at the point of dislocation nucleation. The important finding is
that the variation in dislocation density is correlated with the observed
stress-strain response. Several interesting micro- structural features were
observed during tensile deformation such as slip, phase transformation and
pentagonal structure in necking region affecting the plastic deformation
behaviour of single crystal copper nanowire.
