AbstractThe widths, energies, and periodic potentials of kinks in undissociated screw dislocations are numerically computed within a modified Dietze and Leibfried model. The kinks considered are assumed to lie in a {110} plane. Results are presented for Nb, Mo, and Fe. The kink widths range between 0.8 and 2.6 lattice constants while the amplitudes of the periodic potential felt by the kink when moving along the dislocation are found to be 6, 15, and 2 meV for Nb, Mo, and Fe, respectively. The kinks are short and the kink widths differ, depending on the kink position, by about 100%. The kink energies range between 0.5 and 4 eV.