Research team

Expertise

Structural analysis of condensed matter by neutron diffraction techniques.

Structural and electronic properties of quasi 1D alkali fullerides. 01/10/2004 - 30/09/2006

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)

Research team(s)

    Dynamics of fullerene molecules in C-nanotubes (peapods). 01/01/2003 - 31/12/2004

    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)

    Research team(s)

      Structural and electronic properties of quasi 1D alkali fullerides. 01/10/2002 - 30/09/2004

      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)

      Research team(s)

        Structural and electronic properties of alkali fullerides. 01/10/2001 - 30/09/2002

        Abstract

        Researcher(s)

        Research team(s)

          Orientational disorder in condensed matter. 01/01/2000 - 31/12/2001

          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.

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          Research team(s)

            C60 alkali metal fullerides. 01/10/1996 - 31/12/1997

            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)

            Research team(s)

              Orientational disorder in condensed matter. 01/01/1996 - 31/12/1999

              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.

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              Research team(s)

                Structure and Dynamics of solid C70. 01/07/1995 - 30/06/1996

                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)

                Research team(s)

                  Structure and dynamics of disordered systems. 01/01/1995 - 31/12/1995

                  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.

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                  Research team(s)

                    Structure and dynamics of disordered systems. 01/10/1993 - 30/09/1995

                    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)

                    Research team(s)

                      Structure and dynamics of disordered systems. 01/01/1993 - 31/12/1994

                      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.

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                        Solid fullerenes. 01/10/1992 - 30/06/1993

                        Abstract

                        Microscopic theory of solid C60 and related systems, theoretical description of thermodynamic properties.

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                        Research team(s)

                          Ferroelectrics and dipolar glassesì 01/10/1990 - 30/09/1992

                          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.

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                            Neutron spectroscopy in condensed matter. 01/01/1990 - 30/09/1995

                            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.

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