light - matter interaction and electronic
reconstruction in nanoscale systems and
novel sensor applications and information storage concepts:
bistable molecules in templates
topological effects in metrology
and quantum metrology
scattering on templated molecules
A novel light scattering technique based on the combination of Raman scattering and an atomic force microscope
is implemented and used on single molecular magnets and buried
molecules in nanoporous templates.
magnetic properties of nanocomposites
Nanocomposites have an exceptional large internal surface that
supports the coupling of different order parameters. Plasma sparc sintering allows the
preparation of uniform bulk materials with a well defined
length scales in the nm range, complex nanostructures and exceptional mechanical and electronic properties.
Investigations are performed together with groups from the Inst. of
Inorganic Chemistry, Univ.
Stockholm and the MPI-FKF Stuttgart. ->
Coupling of FM and FE order parameters
Mutual exclusive order parameters can be coupled leading to new
functionalities as observed in multiferroics. Such a behavior is
presently studied in nanoscale composites (meta materials),
incommensurate antiferromagnets and lone pair compounds. Work is performed in collaboration with groups from
Moscow State Univ., Univ. of Augsburg, Chisinau and the TU Braunschweig.
Doping of correlated oxides
and molecular systems
Phase diagrams with competing states, phase separation or unusual
criticality are observed. The resulting soft electronic modes lead
to colossal response to external magnetic or electric fields. Low
energy intermolecular modes critically affect the spin state of the
molecular systems. Work is performed in collaboration with groups
from the university of Frankfurt, Erlangen and Bielefeld.
We acknowledge financial support by DFG (projects and
topical centers), ESF, and the NMWK.