12-02

Structure of singly terminated polar DyScO3(110) surfaces, Physical Review B85 (2012) 165413-1 - 165413-6

J.E. Kleibeuker, B. Kuiper, S. Harkema, D.H.A. Blank, G. Koster, G. Rijnders, P. Tinnemans, E. Vlieg, P.B. Rossen, W. Siemons, G. Portale, J. Ravichandran, J.M. Szepieniec ans R. Ramesh

Abstract: We have studied the polar surface of singly terminated DyScO3 (110) crystals by reflective high-energy electron diffraction, surface x-ray diffraction and angle-resolved mass spectroscopy of recoiled ions. These techniques show that the surfaces are (1 x 1) reconstructed, which points to the absence of ordered cation vacancies at the surface. The best surfaces were obtained after a selective chemical wet etch. We suggest that for ScO2 terminated surfaces, adsorbates, or oxygen vacancies are most likely to occur in order to overcome the polarity difference between stoichiometric bulk crystal and vacuum.