MATERIAL FLOW AT THE SURFACE OF INDENTED INDIUM-PHOSPHIDE

Single crystals of indium phosphide oriented in the [001] direction ha ve been deformed by microhardness indentation. The surface topography was observed by interferential optical microscopy and scanning electro n microscopy in the secondary electron mode. The dislocation distribut ion and their nature at the surface were investigated by scanning elec tron microscopy in the cathodoluminescent mode and transmission electr on microscopy. Both observations have led us to a better understanding of the material now at the surface sample when it is indented.