News from the Physics of Correlated Matter Department

A team lead by scientists from the MPI CPfS developed a novel experimental method that provides direct images of excited states in a transition metal compound without the need for complex calculations. This constitutes a major step for the understanding of the electronic structure and the rich physics of these materials.   more

The intricate interplay of band-formation and electron correlation effects in uranium heavy fermion compounds is subject of an ongoing debate. Here scientists from MPI CPfS in Dresden, University of Cologne, University of Erlangen, Heidelberg University, University of California at San Diego, Los Alamos National Laboratory, Institute of Low Temperature & Structure Research in Wroclaw, Van-der-Waals-Zeeman Institute in Amsterdam, and the German Synchrotron in Hamburg (PETRA-III/DESY) gained new and unexpected insight from advanced spectroscopies on isostructural members of the UM2Si2 family with different properties. more

The research teams of Hao Tjeng from the MPI-CPfS, Andrea Severing from the University of Cologne, Antoine Maignan from CRISMAT Laboratory Caen, and Maurits Haverkort from the University of Heidelberg have succeeded in determining the electronic orbital that is responsible for the Ising magnetism in Ca3Co2O6. A direct image of the donut-shaped orbital has been made using the new Max Planck end-station at German Electron Synchrotron DESY in Hamburg. more

Dr. Chi-Nan Wu was awarded the best poster prize at the 4th Functional Oxide Thin Films for Advanced Energy and Information Technology Conference held in Lisbon, Portugal. more

Dr. Brett Leedahl was awarded with the Poster Session Award at the 11th International Conference on Inelastic X-ray Scattering (IXS 2019) held at Stony Brook, USA, in 24-28 June 2019. more

The newly constructed MPI-NSRRC TPS 45A beamline has been inaugurated on 7-May-2019 in the presence of the German Ambassador in Taiwan and the Deputy Minister of the Taiwan Ministry of Science and Technology. more

A collaboration of the Max-Planck Institute for Chemical Physics of Solids, the University of Heidelberg, and the University of Cologne has developed a new method for imaging electronic orbitals in solids at the German Electron Synchrotron DESY in Hamburg.  more

The topological nature of the surface states in SmB6 is exposed by means of scanning tunneling spectroscopy on samples with magnetic substituents or by using magnetic tunneling tips. These local measurements are complemented by global transport measurements on identical samples. more

A universal strategy based on electrochemically induced fast reconstruction of amorphous nanofilm precursors is proposed for exploring ultrahigh mass activity and extremely stable bifunctional water splitting catalysts. The facile reconstruction strategy is promising for the development of novel efficient catalysts for other advanced energy conversion and storage devices. more

Scanning tunneling spectroscopy data on the archetypical heavy fermion metal YbRh2Si2 establish a hierarchy of energy scales, with the dominance of the lattice Kondo effect requiring temperatures well (about an order of magnitude) below the single-ion Kondo temperature of about 25 K. Only if the lattice Kondo correlations are sufficiently established, quantum critical fluctuations can evolve. more

A combination of scanning tunneling microscopy and locally resolved magnetic stray field measurements unambiguously revealed the polaron formation in the ferromagnetic semimetal EuB6. These polarons are at the heart of the colossal magnetoresistive effects near the ferromagnetic transition in this material. more

New X-ray spectra of the electronic structure of the transition metal oxide Ti2O3 reveal unprecedented electronic molecular detail about the transition from insulator to metal as temperature increases. more

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