  The core structure of dislocations is critical to their mobility, cross slip,
and other plastic behaviors. Atomistic simulation of the core structure is
limited by the size of first-principles density functional theory (DFT)
calculation and the accuracy of classical molecular dynamics with empirical
interatomic potentials. Here, we utilize a Deep Potential (DP) method learned
from DFT calculations to investigate the dislocations of face-centered cubic
copper on a large scale and obtain their core structures and energies. The
validity of the DP description of the core structure and elastic strain from
dislocation is confirmed by a fully discrete Peierls model. Moreover, the DP
method can be further extended easily to dislocations with defects such as
surface or vacancy, and our study will pave a way in the large-scale atomistic
simulation of dislocation on the DFT level.
