Velocities of Screw and 60°‐Dislocations in Silicon

Abstract

Abstract The velocities of screw and 60°‐dislocations in silicon have been measured for temperatures T between 580 and 800 °C and stresses τ between 0.1 and 3 kp/mm 2 . The activation energy for the movement of 60°‐dislocations Q 60° is stress‐dependent in the whole stress range, that for screw dislocation Q s is constant for τ ≧ 0.4 kp/mm 2 and becomes also stress‐dependent below 0.4 kp/mm 2 . The current theories for kink motion do not yield a satisfactory description of the experimental results.