Person:
Shapiro,
Alexander
Shapiro,
Alexander
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ItemMicrostructure and reconstruction of LaAlO₃{100} and {110} surfaces(Georgia Institute of Technology, 1995) Wang, Z. L. (Zhong Lin) ; Shapiro, AlexanderLanthanum-aluminate (LaAlO₃) is one of the optimum substrates for epitaxic growth of thin oxide films. In this paper, the structures of the {100} and {110} surfaces of annealed LaAlO₃ are studied using reflection electron microscopy (REM). [010] and [001] steps have been observed on {100}, these are believed to be the lowest surface energy steps. The {100} surface is atomically flat, but the {110} surfaces exhibit high-density fine structures distributed on large surface terraces. These fine structures may correspond to the formation of small width (100) and (010) facets on the (110) surface. The 5x5 reconstruction is observed on {100}. No reconstruction is found on {110}.