Ti- and Sr-rich surfaces of SrTiO[sub 3] studied by grazing incidence x-ray diffraction

DOI: 10.1063/1.2779972

Authors: A. Fragneto (CNR-Spin, Italy) , G. M. De Luca (CNR-Spin, Italy) , R. Di Capua (CNR-Spin, Italy) , U. Scotti Di Uccio (CNR-Spin, Italy) , M. Salluzzo (CNR-Spin, Italy) , X. Torrelles (Institut de Ciencia de Materials de Barcelona, Spain) , Tien-lin Lee (Diamond Light Source) , J. Zegenhagen (ESRF, France)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Applied Physics Letters , VOL 91 (10)

State: Published (Approved)
Published: September 2007

Abstract: The structure of SrTiO3 (100) (STO) single crystal surfaces has been investigated by grazing incidence x-ray diffraction. The authors found that chemically etched STO is composed - 75% of an ideal TiO2 surface layer and - 25% of SrO and it is very stable when annealed in ultrahigh vacuum or in O2 at high temperatures. A monolayer of SrO, epitaxially grown by pulsed laser deposition, is found to cover only a fraction of the TiO2 layers and exhibits a 2×2 reconstruction with strong structural changes after annealing in conditions typically used for the deposition of oxides.

Subject Areas: Physics

Facility: ESRF