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M: Metallphysik

M 6: Symposium Complex Metallic Alloys I

M 6.3: Vortrag

Freitag, 4. März 2005, 11:30–11:45, TU H1058

VIL C: Physical properties of complex metallic alloys — •Hans-Rainer Trebin — Institut für Theoretische und Angewandte Physik, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart

The physical properties of complex metallic alloys are dominated by the interplay of two length scales: that of the local coordination polyhedra and that of the lattice constants. Expressed differently, a long range translational order is competing with a short range disorder. The consequences are, for example, backfolded energy bands which together with disorder induced scattering inhibit electronic and heat transport. Anharmonic flip motions are coupled to harmonic modes. Alternative atomic and cluster positions allow structural rearrangements and lead to new plastic modes and stress-induced phase transitions. The Virtual Integrated Laboratory C of the NoE-CMA will investigate these properties theoretically and experimentally within three workpages. A report will be given on state of the art, methods, and expectations.