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TRR 80:  From Electronic Correlations to Functionality

Subject Area Physics
Term from 2010 to 2021
Website Homepage
Project identifier Deutsche Forschungsgemeinschaft (DFG) - Project number 107745057
 
The collaborative research center TRR 80 connects fundamental research on emergent new materials properties driven by strong electronic correlations with the focussed exploration for possible new functionalities in technological devices. At the heart of the materials properties of interest are the strong interplay of charge, spin, orbital, and lattice degrees of freedom, leading to a multitude of complex new phases on different length and time-scales with fascinating electronic properties as well as novel generic excitations. Systematic determination of large susceptibilities to applied fields, perturbations and defects yield complex phase diagrams, which represent a major avenue towards tailored functionalities that may be exploited in designed composite-systems. Whereas a wealth of novel phenomena is generic to d- and f-electron materials on the whole, research in TRR 80 focuses in particular on selected transition metal compounds that are suitable to be tractable experimentally and theoretically.The research program pursued in TRR 80 comprises the experimental and theoretical exploration of ultra-pure bulk samples, thin films and heterostructures with near-atomic precision all based on intimately related materials systems. It is organized in terms of twenty-one projects structured in three major research areas of roughly similar number, addressing novel topological aspects, dynamical properties and, last but not least, functionalities. The expertise of the principal investigators includes state of the art materials preparation, the full range of laboratory techniques needed for a measurements of the physical properties on macroscopic, mesoscopic and microscopic scales. A unique facet of the experimental methods in the Transregio concerns the wide range of neutron-based methods (imaging, scattering and positrons) as well as further large-scale-facility based methods such as pulsed magnetic fields and x-rays. The wide range of experimental methods compares with an equally wide range of theoretical expertise comprising fundamental theoretical considerations, phenomenological modeling, and highly advanced material-specific computation of correlation effects. Taken together, the symbiosis of all the available methods and techniques for gaining a deep understanding of the fundamental properties of bulk materials and highly sophisticated, tailored heterostructures will allow harvesting novel functionalities that originate in strong electronic correlations.
DFG Programme CRC/Transregios
International Connection Switzerland

Completed projects

Applicant Institution Universität Augsburg
Co-Applicant Institution Technische Universität München (TUM)
Participating University Universität Duisburg-Essen
Spokespersons Professor Dr. Philipp Gegenwart, since 10/2016; Professor Dr. Alois Loidl, until 9/2016
 
 

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