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Segregation processes occurring in the vicinity of the SrTiO3 (100) single crystal surface induced by low energy Ar+ ion etching was studied with the use of X-ray Photoelectron Spectroscopy (XPS). The etching is selective and after the process the near surface region is depleted in both oxygen and strontium relative to titanium. However, photoemission data show an unexpected effect: the surface of...
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