The area of research of the collaborative research centre 608 is "complex transition metal compounds" in which strong correlations within partially filled internal shells are essential for the physics of the spin, charge, and orbital degrees of freedom. Ordering of these degrees of freedom, their fluctuations, mutual interactions and coupling to the lattice lead to a rich variety of phenomena. In addition, disorder plays an important role. The research addresses basic questions in complex many body systems, in particular the role of electron-electron interactions and the interplay between electronic and lattice degrees of freedom in solids. Research topics are: charge ordering; orbital ordering and orbital fluctuations; quantum spin systems with unconventional ground states or excitations; anomalous metallic states and non-Fermi-liquid behaviour; unconventional superconductors. These topics are studied with a broad spectrum of experimental and theoretical methods from solid state physics, crystallography, and inorganic chemistry, as well as thin film techniques.
DFG Programme
Collaborative Research Centres
International Connection
USA
Completed projects
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A01 - Model systems and new materials: crystal growth, characterisation and structural determination
(Project Heads
Becker-Bohatý, Petra
;
Bohatý, Ladislav
;
Braden, Markus
;
Lorenz, Thomas
)
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A02 - Halides of outer and inner transition metals / Complex oxides of 3d-transition metals
(Project Heads
Meyer, Gerd
;
Möller, Angela
)
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A04 - Design of new materials and new material properties by ultra thin films and multi-layer systems
(Project Heads
Michely, Thomas Werner
;
Tjeng, Liu Hao
)
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B01 - Electrical and thermal transport in complex transition metal compounds
(Project Heads
Abd-Elmeguid, Mohsen
;
Lorenz, Thomas
;
Sologubenko, Alexandr
)
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B2 - Hochdruckuntersuchungen
(Project Heads
Abd-Elmeguid, Mohsen
;
Micklitz, Hans
)
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B03 - Thermodynamic and magnetic properties of complex transition metal compounds
(Project Heads
Hemberger, Joachim
;
Lorenz, Thomas
)
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C01 - Optical spectroscopy on strongly correlated transition-metal oxides
(Project Heads
Grüninger, Markus
;
Hemberger, Joachim
)
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C02 - Neutron scattering on phonons and magnetic excitations in correlated materials
(Project Head
Braden, Markus
)
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C03 - Electron spectroscopy on strongly correlated solid state systems, thin films and surfaces
(Project Heads
Busse, Carsten
;
Hu, Zhiwei
;
Michely, Thomas Werner
;
Tjeng, Liu Hao
)
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C04 - Anomalous scattering of soft x-rays: Spectroscopically-resolved structure studies
(Project Heads
Braden, Markus
;
Schüßler-Langeheine, Christian
;
Tjeng, Liu Hao
)
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C05 - Nonlinear optics of magnetoelectric correlations in multiferroics
(Project Heads
Fiebig, Manfred
;
Lottermoser, Thomas
)
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D01 - Theorie orbitaler, magnetischer und phononischer Freiheitsgrade in Übergangsmetalloxidsystemen
(Project Heads
Müller-Hartmann, Erwin
;
Uhrig, Götz S.
)
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D02 - Numerische Untersuchungen dynamischer und thermodynamischer Eigenschaften stark korrelierter Systeme
(Project Heads
Löw, Ute
;
Schadschneider, Andreas
;
Uhrig, Götz S.
)
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D03 - Analytische Untersuchungen von Quantenspin- und Fermionensystemen
(Project Heads
Rosch, Achim
;
Schadschneider, Andreas
;
Zittartz, Johannes
)
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D04 - Disorder and quantum fluctuations in effective field theories for highly correlated materials
(Project Head
Nattermann, Thomas
)
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D5 - Nichtgleichgewichtseffekte in stark korrelierten Systemen
(Project Head
Monien, Hartmut
)
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D07 - Heat, charge and spin transport in spin systems and almost magnetic materials
(Project Heads
Rosch, Achim
;
Vojta, Matthias
)
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D08 - Inhomogenitäten in stark korrelierten Elektronensystemen
(Project Head
Kroha, Johann
)
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D09 - Ab-initio and model calculations of the electronic structure of strongly correlated oxides
(Project Heads
Bulla, Ralf
;
Tjeng, Liu Hao
)
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D10 - Quantum criticality and geometric frustration in strongly correlated systems
(Project Head
Vojta, Matthias
)
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D11 - Charge, spin, and orbital degrees of freedom in transition metal compounds: Strong correlations and competing phases
(Project Heads
Rosch, Achim
;
Vojta, Matthias
)
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D12 - Quantum impurities in correlated metals and insulators
(Project Heads
Bulla, Ralf
;
Kroha, Johann
;
Vojta, Matthias
)
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D13 - Heterostructures, surfaces and domain walls in correlated systems
(Project Heads
Kroha, Johann
;
Rosch, Achim
)
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S - Central Administration
(Project Heads
Freimuth, Axel
;
Rosch, Achim
;
Tjeng, Liu Hao
)
