phenomena

Emergent phenomena occur in systems in which the electron-electron repulsion is large.
Understanding these phenomena is one of the central issues in solid-state physics.
The rich variety of emergent behaviors is the result of the interplay between
Coulomb repulsion, orbital, spin, charge degrees of freedom and chemistry.
We are interested in understanding this interplay.

materials & topics

• transition-metal oxides
• high temperature superconducting cuprates
• Mott transition
• orbital and charge ordering
• NMR and Resonant X ray scattering experiments in correlated materials
• highly frustrated systems
• Kondo and heavy fermion systems
• Kondo effect in quantum dots

methods

• constructing ab-initio many-body models
• electronic structure methods (LMTO, NMTO, LAPW, pseudopotentials, LDA, LDA+U)
• Wannier functions (NMTO downfolding)
• many-body techniques (DMFT, QMC, NCA, variational methods, perturbative renormalization group)
• combination of electronic structure and many-body methods

projects & support

• Understanding strong electronic correlations: The role of the full Coulomb Vertex
  
  JARA-SIM seed project
  
  
• Orbital Ordering, Realistic Coulomb vertex and Multiplet Effects
  
  Research Unit FOR1346
  
  
• Strongly correlated ruthenates
  
  European Project MAMA