Spectroscopies and Inverse PhotoEmission laboratory SIPE

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Contact: Maddalena Pedio

The scientific activity of the SIPE Laboratory is focused on the interconnection between the empty electronic configuration of condensed matter systems and their structure and dimensionality. The main topics include low dimensional systems, carbon-based materials, molecular thin flms and organic-inorganic interfaces. IPS technique is complementary to Photoemission (PES) and combined PES-IPS data provide information on the surface electronic transport gap of sample. Figure shows the main SIPE chamber, a schematic of the IPS process and an example of organic-inorganic PES-IPS measurement.

The equipment includes two ultra high vacuum (UHV) chambers and a transfer load lock. The preparation chamber has standard Surface Science tools, with a CMA for AES and Low Energy Electron Diffraction (LEED) and is also used for the growth of the films of the organic molecules and metals. The connected second UHV chamber is devoted to the empty electronic states analysis by means of Inverse Photoemission, with Geiger Mueller detectors and a highly collimated electron gun, overall resolution <0.3 eV. This configuration allows an Angular Resolved IPS acquisition (KR-IPS), i.e. the mapping of unoccupied electronic states vs the wave-vector k// . The Load lock is a movable UHV chamber which can be connected with other TASC apparatus, including beamlines at nearby ELETTRA facility, to complement the KR-IPS with Direct Photoemission (PES), Core level photoemission and NEXAFS.

The laboratory offers access to external users through the NFFA european project see here

Detail for proposal application can be found here.

PhD available: Studi di Processi di Eccitazione e Diseccitazione in Materiali Nanostrutturati

 

A pdf in italian and english can be downloaded here, and more details can be found here

 

The group activity is organized in various interconnected topics:

  • Surface Science
  • Organic-inorganic interfaces
    • Part of the research activity is focused on open shell molecular thin films of spintronics interest. See here for more details
  • Molecular thin flms: Growth and advanced characterization
  • Transient states in semiconductors
  • Nanostructured C-based materials
  • Excitation and diexcitation processes in nanostructured materials, within JRA4 of NFFA-Europe project
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    • Instrumentation

     

    PhD available: Advanced Characterization of molecular films grown on bidimensional substrates. Università Trieste, Nanotechnology PhD XXXIV ciclo