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F. Aumayr:
"Nanoscale surface modifications by individual highly charged ion impact";
Vortrag: Invited Review Lecture, 16th International Conference on the Physics of Highly Charged Ions (HCI 2012), Heidelberg/Germany (eingeladen); 07.09.2012; in: "Book of Abstracts, 16th International Conference on the Physics of Highly Charged Ions (HCI 2012)", (2012), S. 23.

This review lecture focuses on recent advances in the understanding of the formation of
surface nanostructures, an intriguing phenomenon in ion-surface interaction due to the impact
of individual ions. In many solid targets, swift heavy ions produce narrow cylindrical tracks
accompanied by the formation of a surface nanostructure. More recently, a similar nanometric
surface effect has been revealed for the impact of individual, very slow but highly charged
ions [1 - 4]. While swift ions transfer their large kinetic energy to the target via ionization and
electronic excitation processes (electronic stopping), slow highly charged ions produce
surface structures due to potential energy deposited at the top surface layers. Despite the
differences in primary excitation, the similarity between the nanostructures is striking and
strongly points to a common mechanism related to the energy transfer from the electronic to
the lattice system of the target. A comparison of surface structures induced by swift heavy
ions and slow highly charged ions provides a valuable insight to better understand the
formation mechanisms [3].