Spectroscopy for Chemical
Determines the chemical composition (spatial-resolved), the atomic structure,
and the electronic structure at interfaces
High Resolution (spatial, energy, angle) Photoelectron Emission + SEM
XPS < 3µm
SEM < 100nm
Energy Resolution: XPS: 0.48eV, UPS: <20meV.
Angular Resolution: 0.1°.
Imaging of heterogeneous interfaces
Identifies chemical species at interfaces in different chemical environments.
Angular resolved photoelectron diffraction: structure at interfaces surfaces
The ESCA apparatus is augmented by a preparation chamber (housing LEED,
QMS, IRAS, Knudsen evaporators, facilities to clean a surface), making
this system extraordinarily flexible and versatile. The use of a carousel
chamber to transfer samples allows to easily extent the apparatus for new
applications just by adding a new UHV chamber.
Sample cooling to 150K and heating to 900K.
Charge Neutralization: needed for the investigation of insulators.
Some possible applications: Structure of molecular layers on surfaces
Fermi-Surface mapping of HTc-superconductors.
High-resolution XPS and SEM is useful for almost
all experimental groups at the MPI of solid state research.