Ion-surface-interaction

We study fundamental ion - surface interactions, in particular the impact of slow highly charged ions on surfaces leading to the formation of exotic "hollow atoms". The use of highly charged ions as a tool for controlled surface modification via "potential sputtering" are being investigated in view of possible practical applications (e.g. nano-structuring of insulator surfaces).

• Ion induced electron emission: Measurements of electron emission from insulators upon impact of highly charged ions.
• Sputtering and sticking coefficient measurements
• Nanostructuring of surfaces: Creation of Nano-sized surface modifications by irradiation with slow highly charged ions.
• Capillary guiding: Investigation of the guiding effect in insulating capillaries.

Review:
F. Aumayr, S. Facsko, A. S. El-Said, C. Trautmann and M. Schleberger
Topical Review: Single-ion induced surface nanostructures - A comparison between slow highly-charged and swift heavy ions
Journal of Physics: Condensed Matter 23 (2011) 393001 (23 pages)

A.S. El-Said, R. Heller, W. Meissl, R. Ritter, S. Facsko, C. Lemell, B. Solleder, I. Gebeshuber, G. Betz, M. Toulemonde, W. Möller, J. Burgdörfer, and F. Aumayr
Creation of Nanohillocks on CaF2 Surfaces by Single Slow Highly Charged Ions
Physical Review Letters 100 (2008) 237601 (1-4)

Review:
F. Aumayr and HP. Winter
Potential sputtering
Philosophical Transactions of the Royal Society London A 362 (2004) 77 -102

G. Hayderer, S. Cernusca, M. Schmid, P. Varga, HP. Winter and F. Aumayr, D. Niemann, V. Hoffmann, N. Stolterfoht, C. Lemell, L. Wirtz, and J. Burgdörfer
Kinetically-assisted potential sputtering of insulators by highly charged ions
Physical Review Letters 86 (2001) 3530 - 3533

G. Hayderer, M. Schmid, P. Varga, HP. Winter, F. Aumayr, L. Wirtz, C. Lemell, J. Burgdörfer, L. Hägg and C.O. Reinhold
Threshold for Potential Sputtering of LiF
Physical Review Letters 83 (1999) 3948 - 3951

M. Sporn, G. Libiseller, T. Neidhart, M. Schmid, F. Aumayr, HP. Winter, P. Varga, M. Grether , D. Niemann and N. Stolterfoht
Potential Sputtering of Clean SiO2 by Slow Highly Charged Ions
Physical Review Letters 79 (1997) 945 - 948

T. Neidhart, F. Pichler, F. Aumayr, HP. Winter, M. Schmid and P. Varga
Potential sputtering of Lithium Fluoride by Slow Multicharged Ions
Physical Review Letters 74 (1995) 5280 - 5283

Review:
F. Aumayr, and HP. Winter
Potential electron emission from metal and insulator surfaces
Springer Tracts in Modern Physics 225 (2007) 79 - 112 (takes a long time loading!)

J. Stöckl, T. Suta, F. Ditroi, HP. Winter, and F. Aumayr
Separation of potential and kinetic electron emission for grazing impact of multiply charged Ar ions on a LiF(001) surface
Physical Review Letters 93 (2004) 263201

C. Lemell, J. Stöckl, J. Burgdörfer, G. Betz, HP. Winter and F. Aumayr
Multicharged ion impact on clean Au(111): Suppression of kinetic electron emission in glancing angle scattering
Physical Review Letters 81 (1998) 1965 - 1968

J. Limburg, S. Schippers; R. Hoekstra, R. Morgenstern, H. Kurz, F. Aumayr and HP. Winter
Do hollow atoms exist in front of an insulating LiF surface
Physical Review Letters 75 (1995) 217 - 219

F. Aumayr, H. Kurz, D. Schneider, M.A. Briere, J.W. McDonald, C.E. Cunningham and HP. Winter
Emission of electrons from a clean gold surface induced by slow, very highly charged ions at the image charge acceleration limit
Physical Review Letters 71 (1993) 1943 - 1946

H. Kurz, K. Töglhofer, HP. Winter, F. Aumayr and R. Mann
Electron emission from slow hollow atoms at a clean metal surface
Physical Review Letters 69 (1992) 1140 - 1143

J.I. Juaristi, C. Auth, H. Winter, A. Arnau, K. Eder, D. Semrad, F. Aumayr, P. Bauer, and P.M. Echenique
Unexpected Behaviour of the Stopping of Slow Ions in Ionic Crystals
Physical Review Letters 84 (2000) 2124 - 2127

C. Lemell, J. Stöckl, J. Burgdörfer, G. Betz, HP. Winter and F. Aumayr
Multicharged ion impact on clean Au(111): Suppression of kinetic electron emission in glancing angle scattering
Physical Review Letters 81 (1998) 1965 - 1968

K. Eder, D. Semrad, P. Bauer, R. Golser, P. Maier-Komor, F. Aumayr, M. Penalba, A. Arnau, J.M. Ugalde and P.M. Echenique
Absence of a “threshold effect” in the energy loss of slow protons traversing solid large band gap insulators
Physical Review Letters 79 (1997) 4112 - 4115

R. Golser, D. Semrad and F. Aumayr
Electronic stopping in a He-H2 mixture substantially exceeds Bragg's rule value
Physical Review Letters 76 (1996) 3104 - 3107