Physics of Correlated Matter

The spectacular physical properties often observed in materials containing transition metal and rare-earth elements challenge our comprehension of solid state physics These properties include superconductivity, unusually large magneto-resistance, metal-insulator transitions, heavy-fermion behaviour, multiferroicity, and phenomena involving topologically protected states. We would like to understand how the electrons in such materials interact with each other as to generate those unusual quantum phenomena. From a theoretical viewpoint it turns out that the equations we have to solve are so complicated that we will not be able to obtain exact solutions. To make things worse and more fascinating at the same time, tiny changes in temperature, pressure or in the material composition may cause large changes of the properties, so that it appears that there are many solutions available that are lying very close together in energy.

With exact solutions out of reach, the objective of our ‘Physics of Correlated Matter’ department is to find smart approximations by which we can capture the essential ‘physics’ to describe the ‘correlated’ motion of the electrons in such materials. It may very well be that we need to develop and use different approximations for different materials or properties. In order to probe these materials and properties the research activities of our department are focussed on the investigation of the electronic structure of the materials, using both spectroscopic tools as well as material specific many body calculations. This combined experimental and theoretical work is essential to identify the most suited approximation. The experimental activities have also a strong material development component: new materials, both in bulk as well as in thin film form, are synthesized in order to tune the relative strength of the relevant interactions. Guided by the smart approximations developed, we aim to optimize the properties for applications and we hope to even discover new phenomena.

Departmental  organisation

The activities of our department are centered around researchers having an expertise of their own. They are trained as theorists or experimentalists, as physicists or chemists. They are leading a group and follow their scientific interests independently. Together they form a team that carries out projects in a collaborative manner. They complement each other and share a common interest in various aspects of correlated materials.

A2.24 Cryo Scanning Tunneling Microscope

A3.01 Laue Camera

A3.04 Mirror Furnace

B2.4.02-08 Molecular Beam Epitaxy

B2.4.16-18 Physical Properties Measuring System (PPMS)

B3.3.11-13 Scanning Tunneling Microscope

B3.3.15-17 Thin Film Preparation

MPI-NSRRC TPS 45A beamline and MPI end station at TPS, Taiwan

HAXPES at NSRRC-BL12 XU beamline-Spring8-Japan

s-NIXS end station at P01 beamline, PETRA III, Hamburg


Selective Orbital Imaging of Excited States with X-Ray Spectroscopy: The Example of α-MnS

January 13, 2021

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 ...

Duality of 5f electrons in UM2Si2

November 23, 2020

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 ...

Go to Editor View