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Research Group Prof. K. H. Rieder

Fachbereich Physik der Freien Universität Berlin
Institut für Experimentalphysik

Prof. K. H. Rieder Prof. Dr. Karl-Heinz Rieder

Research Fields: Surfaces of Solids

The main activities of the group concern surface structure and surface dynamics: The structure of clean and adsorbate covered surfaces are studied under UHV-conditions by employing diffraction techniques (TEAMS, HAS-TOF), especially emphasizing atom beam diffraction and spot profile analysis low energy electron diffraction (SPA-LEED) as well as scanning tunneling microscopy (STM/AFM). The growth of thin metallic films is also characterized with these techniques and in addition a new method based on the cantilever beam principle (ISM/CBM) was developed to study intrinsic stress and magnetism of thin films. The dynamical excitations of surfaces, adsorbate systems, and thin films are studied with inelastic helium beam scattering and high resolution electron energy loss spectroscopy (HREELS). With a home built low-cost but versatile low temperature STM we proved manipulation of single atoms and small molecules as well as nanostructuring of surfaces on an atom by atom basis. STM at very high temperatures is being developed for studies of surface phase transitions. These dedicated methods are augmented by conventional surface analysis techniques like low energy electron diffraction, Auger electron spectroscopy, and photoelectron spectroscopy.


Experimental Methods

[TEAMS] Thermal Energy Atom and Molecular Scattering
Surface structure: adsorbates, reconstructions; interaction potentials
(Dr. W. Theis, Dr. M. Patting)

[HAS] Helium Atom Scattering
Surface phonons and structure, growth and dynamics of thin films
(Dr. W. Theis, Dr. H. Tröger, Hem Raj Sharma, N. Pertaya)

[ISM/CBM] Intrinsic Stress Measurement and Cantilever Beam Method
Growth, structure and stress of thin films; magnetic properties and magnetostriction
(Dr. R. Koch, Dr. B. Wassermann, G. Wedler, J. Schulz)

[STM/AFM] Scanning Tunneling Microscopy and Atomic Force Microscopy
Surface structure: adsorbates and reconstruction; thin films; manipulation of atoms and molecules, nano structuring
(Dr. G. Meyer, Dr. F. Moresco, Dr. K. Morgenstern, Dr. Saw Wai Hla, Dr. S. Fölsch, J.Repp, S. Zoephel, K. Braun)

[HREELS] High Resolution Electron Energy Loss Spectroscopy
Adsorbate vibrations, surface structure, surface phonons
(Dr. F. Moresco, Dr. A. Schikin, We-Hyo Soe)

[SPALEED/SMOKE] Spot-Analysing - Low Energy Electron Diffraction and Surface Magneto-Optical Kerr Effect
Surface structure and defects, growth of thin films and magnetism
(Dr. S. Fölsch, A. Helms, A. Riemann)

Contact & Address

Prof. K.H. Rieder
phone: germany-(0)30-838-52805  New phone number !!
email: rieder@physik.fu-berlin.de

 A. Scheffler (secretary)
phone: germany-(0)30-838-52801  New phone number !!
FAX: germany-(0)30-838-51355
email: ascheffl@physik.fu-berlin.de

 Ch. Roth (technician)
phone: germany-(0)30-838-52807 / 56062  New phone number !!
email: roth@physik.fu-berlin.de

 postal address:
Prof. Dr. Karl-Heinz Rieder
Freie Universität Berlin, Institut für Experimentalphysik
Arnimallee 14
D-14195 Berlin


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These pages are made by Dr. R. Apel / Ch. Roth (exception: HAS-TOF)

(Last modified: 11. Februar 2000)