Publication
The role of a simple surface defect, such as a step, for relaxing the stress applied to a semiconductor, has been investigated by means of large-scale first-principles calculations. Our results indicate that the step is the privileged site for initiating plasticity, with the formation and glide of 60 degrees dislocations for both tensile and compressive deformations. We have also examined the effect of surface and step termination on the plastic mechanisms.
Matthieu Wyart, Marko Popovic, Valentin Camille Druelle
Roland Logé, Christian Leinenbach, Efthymios Polatidis, Markus Strobl