Research team
Expertise
Structural analysis of condensed matter by neutron diffraction techniques.
Structural and electronic properties of quasi 1D alkali fullerides.
Abstract
The subject of the thesis is the explanation of structural and electronic properties of polymerized alkali fullerides. Crystals of these new synthetic carbon compounds AC60, where A = K, Rb, Cs is an alkali atom and C60 the fullerene molecule, exhibit structural and electronic properties that depend on the nature of the alkali atom.Researcher(s)
- Promoter: Michel Karl
- Fellow: Verberck Bart
Research team(s)
Project type(s)
- Research Project
Dynamics of fullerene molecules in C-nanotubes (peapods).
Abstract
The dynamics of C60 (and C70) molecules encapsulated in single-wall nanotubes, (C60)n@SWNT, will be studied by analytical and numerical theory. Molecular and site symmetry adapted rotator functions will be constructed. A model for the intermolecular potential and the molecule'wall potential will be established. Orientational density distribution functions and correlation functions will be studied. The possibility of orientational and structural phase transitions will be investigated. Raman and NMR experiments will be explained.Researcher(s)
- Promoter: Michel Karl
- Co-promoter: Lamoen Dirk
Research team(s)
Project type(s)
- Research Project
Structural and electronic properties of quasi 1D alkali fullerides.
Abstract
The subject of the thesis is the explanation of structural and electronic properties of polymerized alkali fullerides. Crystals of these new synthetic carbon compounds AC60, where A = K, Rb, Cs is an alkali atom and C60 the fullerene molecule, exhibit structural and electronic properties that depend on the nature of the alkali atom.Researcher(s)
- Promoter: Michel Karl
- Fellow: Verberck Bart
Research team(s)
Project type(s)
- Research Project
Structural and electronic properties of alkali fullerides.
Abstract
Researcher(s)
- Promoter: Michel Karl
- Fellow: Verberck Bart
Research team(s)
Project type(s)
- Research Project
Orientational disorder in condensed matter.
Abstract
Theoretical studies of the structure and orientational dynamics of molecular crystals. Study of new glassy molecular crystals C60: C70. Theoretical explanation of diffraction experiments using neutrons or synchrotron radiation.Researcher(s)
- Promoter: Michel Karl
Research team(s)
Project type(s)
- Research Project
C60 alkali metal fullerides.
Abstract
Starting from a microscopic model of interactions in A+C60 crystals, where A+ is an alkali metal ion and C60 the molecular ion, we present a theory of the phase transitions from the orientationally disordered FM3m structure to polymer and driver phases.Researcher(s)
- Promoter: Michel Karl
Research team(s)
Project type(s)
- Research Project
Orientational disorder in condensed matter.
Abstract
Theoretical studies of the structure and orientational dynamics of molecular crystals. Study of new glassy molecular crystals C60: C70. Theoretical explanation of diffraction experiments using neutrons or synchrotron radiation.Researcher(s)
- Promoter: Michel Karl
Research team(s)
Project type(s)
- Research Project
Structure and Dynamics of solid C70.
Abstract
Using concepts of theoretical physics, we study the statics and dynamics of solid C70 in the rhombohedral phase. We describe the transition to the low temperature monoclinic phase and hope to elucidate the space group of that phase.Researcher(s)
- Promoter: Michel Karl
Research team(s)
Project type(s)
- Research Project
Structure and dynamics of disordered systems.
Abstract
The project has two parts a) orientational disorder in crystals, theory of molecular glasses, molecular crystals and fullerenes; b) random walk problems and anomalous transport properties in classical lattice gas models, theory of percolation and of nucleation phenomena.Researcher(s)
- Promoter: Michel Karl
- Co-promoter: Naudts Jan
Research team(s)
Project type(s)
- Research Project
Structure and dynamics of disordered systems.
Abstract
The project has two parts a) orientational disorder in crystals, theory of molecular glasses, molecular crystals and fullerenes; b) random walk problems and anomalous transport properties in classical lattice gas models, theory of percolation and of nucleation phenomena.Researcher(s)
- Promoter: Michel Karl
Research team(s)
Project type(s)
- Research Project
Structure and dynamics of disordered systems.
Abstract
The project has two parts a) orientational disorder in crystals, theory of molecular glasses, molecular crystals and fullerenes; b) random walk problems and anomalous transport properties in classical lattice gas models, theory of percolation and of nucleation phenomena.Researcher(s)
- Promoter: Michel Karl
- Co-promoter: Naudts Jan
Research team(s)
Project type(s)
- Research Project
Solid fullerenes.
Abstract
Microscopic theory of solid C60 and related systems, theoretical description of thermodynamic properties.Researcher(s)
- Promoter: Michel Karl
Research team(s)
Project type(s)
- Research Project
Ferroelectrics and dipolar glassesì
Abstract
Microscopic study of ferroelectricity and structural phase transitions in mixed crystals. Phase transitions in nitrites and perovskites. Dielectric properties. Influence of substitutional disorder on various properties.Researcher(s)
- Promoter: Michel Karl
- Fellow: Lamoen Dirk
Research team(s)
Project type(s)
- Research Project
Neutron spectroscopy in condensed matter.
Abstract
The time of flight spectrometer Mibemol at the Lab. L. Brillioun, CEA/CNRS (Saclay, France) is used for the study of dynamical properties of condensed matter on a microscopical level in Physics, chemistry, biology and materials research.Researcher(s)
- Promoter: Michel Karl
Research team(s)
Project type(s)
- Research Project