Research activities
Mechanical spectroscopy on different time scales offers a way to measure elastic constants, viscosity of liquids, polymers, bio systems and glasses as well as to investigate loss mechanisms in those complex fluids.
Identification of the β-Process (wing) in the loss spectra of PdCuSi
For a deeper understanding of the connection of microscopic and macroscopic behavior of glasses, the correlation between α- und β-relaxation as seen in loss spectra needs further explanation. At the moment, we discuss the α-process in the context of shear transformation zones (STZ) und the β-Process with chain like excitations (Strings).
To examine microscopic processes, which are not accessible experimentally, molecular dynamics simulations are employed for comparison. These are obtained from a fruitful collaboration with the group of Prof. Stefan Mayr
Website: http://www.ph1.physik.uni-goettingen.de/agmayr/Deutsch/gruppemayr.htm
The great progress achieved in the description of the primary (α-)relaxation is supported by the results of computer simulations.
To explain the thermo physical properties of undercooled melts, the thermal expansion of semi conductors in microgravity is examined.