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Electronic and Optical Properties of Oxides

  • Oxygen defects  in CeO2(111)  
  • Luminescence from  MgO
  • Probing the band gap of oxide surfaces
  • Characterizing point- and line-defects with respect to their atomic structure, thermodynamic stability and charge state
  • Identifying gap states induced by localized defects

 

Oxygen Vacancies in CeO2(111)

  • Inducing surface and subsurface oxygen vacancies
  • Probing 4f-type defect levels in the gap and electron localization in adjacent Ce ions

 

Oxygen-defects (5×3.5 nm2) and associated gap states in STM conductance spectroscopy

For details: Jerratsch et al. Phys. Rev. Lett. 106 (2011) 246801

STM Luminescence from MgO

  • Exciting optical modes via electron injection from STM tip
  • Probing local luminescence by mirror system and CCD detector

MgO/Mo(001) topography and optical map (100×100 nm2) and STM luminescence spectra after doping with europium

 

For details:

Benia et al, New J. Phys. 10 (2008) 013010, Stavale et al. Appl. Phys. Lett. 101 (2012) 013109.

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