News from the Physics of Correlated Matter Department

An international team led by Max Planck's Steffen Wirth uncovers critical CeB₆ surface reconstructions impacting electronic behavior. more

more

more

Two bistable and reversibly controllable antiferromagnetic states in strained BiFeO₃ (BFO) films are discovered. These two non-volatile antiferromagnetic states are successfully patterned with a non-contact approach combining both optical and magnetic methods. The written antiferromagnetic pattern is electrically readable with at least 30% signal difference. This work promises an efficient route toward practical applications of antiferromagnetic spintronics. more

The Kondo effect, a hallmark of the physics of correlated electrons, is extremely rarely observed in transition metal oxides.  Over half a century after its discovery, the study of the Kondo physics and related phenomena is largely limited to rare-earth compounds. Here, an international team led by scientists from the MPI CPfS, the Osaka Prefecture University, and the TU Wien demonstrate that Kondo physics is realized in CaCu₃Ru₄O₁₂, a transition metal oxide with a perovskite structure.
  more

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

more

more

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 4^th 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