The collision of a noble gas ion with a surface results in a multitude of processes, including the emission of substrate atoms in the vacuum and the creation of adatoms, surface - and bulk vacancies. On the time scale of the ion impact these processes are virtually independent of temperature. Between ion impacts in the same microscopic area, depending on substrate temperature, diffusion processes can dramatically alter the morphology due to the coarsening and annihilation of adatom - and vacancy clusters. The temperature dependence between 200 and 300 K of the resulting morphology of Cu(001) is studied with STM for very low fluences, i.e. the regime in which only about 1% of the surface atoms has been hit by an incoming ion. The use of Ar ions with energy of 800 eV limits the depth-range of the ion impact to the very surface region.
|Publication status||Published - 27 Mar 2006|
|Event||DPG Frühjahrstagung 2006 Dresden: (DPG Spring Meeting) - Dresden, Germany|
Duration: 27 Mar 2006 → 31 Mar 2006
|Conference||DPG Frühjahrstagung 2006 Dresden|
|Period||27/03/06 → 31/03/06|