Processing the SrTiO 3(001) surface results in the self-assembly of reduced titanate nanowires whose widths are approximately 1 nm. We have imaged these nanowires and their defects at elevated temperatures by atomic resolution scanning tunneling microscopy. The nanowire structure is modeled with density functional theory, and defects observed in the center of the nanowire are determined to be Ti 4O 3 vacancy clusters. The activation energy for Ti 4O 3 vacancy cluster diffusion is explicitly measured as 4.98±0.17eV with an exponential prefactor of μ=6.57×1029s -1.
ASJC Scopus subject areas
- Physics and Astronomy(all)