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Low energy electron diffraction (LEED) and photoelectron spectroscopy (PES) have been employed to study the (100) SrTiO 3 surface annealed in ultra high vacuum. The annealing was performed up to 830 o C. After annealing at 830 o C, we have observed from PES spectra the appearance of the conduction band and from LEED patterns the (5x5)R26.6 o superstructure. Both features...
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