From erosion to bombardment-induced growth on Ir(111)

Petersen A, Busse C, Polop C, Linke U, Michely T

Research article (journal)

Abstract

The morphology of the ion bombarded Ir(111) surface is studied using scanning tunneling microscopy. At a temperature of 880 K and ion fluences of the order of 1017ions/m2 the experiments show a transition from an erosion regime to a bombardment-induced growth regime with increasing ion energy at energies of a few keV. In dependence of ion fluence, for energies exceeding a few keV a transition from bombardment-induced growth to erosion is observed. The growth effect is caused by the bombardment-induced formation of bulk vacancy clusters, remaining at the bombardment temperature still stable against diffusion and annealing at the surface. Annealing experiments show a gradual decrease of bombardment-induced subsurface damage with increasing temperature. Ion energy, ion fluence, and temperature dependence of the growth phenomenon are explained in terms of an effective damage area below the surface.

Details zur Publikation

Release year: 2003
Language in which the publication is written: English
Link to the full text: http://www.scopus.com/inward/record.url?eid=2-s2.0-1042299857&partnerID=40&md5=da449920b0dfff7cea65ddfef9c4e0e1