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PEARL - X03DA: Photoemission and Atomic Resolution Laboratory

PEARL is dedicated to the characterisation of local atomic and electronic structure at the surface of a variety of systems such as molecular networks, organic and inorganic semiconductors, nanostructures, thin films, and complex materials. Soft x-ray photoelectron spectroscopy (XPS, ARPES) and diffraction (XPD/PhD) as well as scanning tunnelling microscopy (STM) and spectroscopy (STS) give insight into fundamental phenomena in condensed matter physics that are intimately tied to atomic arrangement or structural transitions.

The laboratory integrates a soft x-ray beamline with an angle-resolved photoelectron spectrometer and a low-temperature scanning tunnelling microscope (STM) in the same ultra-high vacuum system. On-site surface preparation facilities include ion sputtering, high-temperature annealing and physical vapour deposition. A fast-entry load lock and ports for user-supplied equipment are also available.

The beamline is operational and open to general users, cf. User Information. For further information please refer to our beamline article, or contact the beamline scientist, matthias.muntwiler@psi.ch.
Energy range 60 - 2000 eV
Photon Flux 2 × 1011 ph/s at 1 keV on sample
Spectral resolution E/dE up to 7000 at 400 eV
Spot size 170 μm H x 73 μm V FWHM
1.0 mm x 1.0 mm
Polarization Linear horizontal
Partial circular right/left
Endstation Angle-resolved photoelectron spectroscopy (ARPES, XPS, XPD/PhD)
Scanning tunnelling microscopy and spectroscopy (STM, STS)
In-situ surface preparation facilities
The PEARL beamline is operated by the Molecular Nanoscience Group. It has been developed and funded in collaboration with a consortium of five Swiss research institutions.

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