The discrete correction of the core structure for the ⟨100⟩{010} edge dislocation in bcc Fe

The core structure of the < 100 >{010} edge dislocations in body-centered cubic (bcc) crystal Fe has been investigated by the modified Peierls-Nabarro (P-N) equation which includes the discrete correction. An analytical expression of the dislocation solution of the dislocation equation has been obtained by using the truncation approximation. It is found that the dislocation width is nearly doubled by the discrete effects and the agreement between the theoretical prediction and the numerical simulation is improved remarkably.