Berlin 2015 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 8: Liquid and Amorphous Metals II: Structure Formation in Metallic Glasses
MM 8.1: Vortrag
Montag, 16. März 2015, 11:45–12:00, H 0107
On the path from disorder to long-range order in condensed matter — •Peter Häussler — Chemnitz University of Technology, Institute of Physics, 09107 Chemnitz
We well know how molecules form, but we are still lacking a deep understanding how long-range structural order is arising. Liquid and amorphous systems are predetermined to solve this situation. Both are following the completely disordered state and are precursors of the crystals. They should still show individual features of the elements involved, but should also show features of ordering. The emergence of medium-range order, as well as the correlated emergence and evolution of physical properties are in the focus of our research.
After the preparation of very different amorphous thin films we studied their structure and electronic transport properties over a large range of temperature and composition. In this contribution we will report on several involved scenarios, as well as new techniques to analyze the data, in particular the structural ones. We will report on pure elements, binary as well as ternary inorganic alloys, irrespective whether they are insulating or stay metallic. Our description will be the most simple to imagine, will deal with a few global species only, which themselves consist of collectively acting subspecies. Along this line we are able to reduce the tremendous number of parameters to describe e.g. 1023 individual atoms/ions to a few parameters only. Accordingly, we are able to understand the major structure-forming effects.