TY - JOUR
T1 - Atomically defined rare earth scandate crystal surfaces
AU - Kleibeuker, Josée E.
AU - Koster, Gertjan
AU - Siemons, Wolter
AU - Dubbink, David
AU - Kuiper, Bouwe
AU - Blok, Jeroen L.
AU - Yang, Chan-Ho
AU - Ravichandran, Jayakanth
AU - Ramesh, Ramamoorthy
AU - ten Elshof, Johan E.
AU - Blank, Dave H.A.
AU - Rijnders, Guus
PY - 2010
Y1 - 2010
N2 - The fabrication of well-defined, atomically sharp substrate surfaces over a wide range of lattice parameters is reported, which is crucial for atomically regulated epitaxial growth of complex oxide heterostructures. By applying a framework for controlled selective wet etching of complex oxides on the stable rare-earth scandates (REScO3), a pseudocubic = 0.394 – 0.404 nm, the large chemical sensitivity of REScO3 to basic solutions is exploited, which results in reproducible, single-terminated surfaces. Time-of-flight mass-spectroscopy measurements show that after wet etching the surfaces are predominantly ScO2 -terminated. Moreover, the morphology study of SrRuO3 thin-film growth gives no evidence for mixed termination. Therefore, it is concluded that the REScO3 surfaces are completely ScO2-terminated.
AB - The fabrication of well-defined, atomically sharp substrate surfaces over a wide range of lattice parameters is reported, which is crucial for atomically regulated epitaxial growth of complex oxide heterostructures. By applying a framework for controlled selective wet etching of complex oxides on the stable rare-earth scandates (REScO3), a pseudocubic = 0.394 – 0.404 nm, the large chemical sensitivity of REScO3 to basic solutions is exploited, which results in reproducible, single-terminated surfaces. Time-of-flight mass-spectroscopy measurements show that after wet etching the surfaces are predominantly ScO2 -terminated. Moreover, the morphology study of SrRuO3 thin-film growth gives no evidence for mixed termination. Therefore, it is concluded that the REScO3 surfaces are completely ScO2-terminated.
U2 - 10.1002/adfm.201000889
DO - 10.1002/adfm.201000889
M3 - Article
SN - 1616-301X
VL - 20
SP - 3490
EP - 3496
JO - Advanced functional materials
JF - Advanced functional materials
IS - 20
ER -