Polar compensation at the surface of SrTiO3 (111)

Abstract

We have systematically investigated the annealing effect on the structure and composition of the polar surface of SrTiO3 (111), starting with an ex-situ chemical etch. The relative surface concentration between Ti and Sr strongly depends on both the annealing temperature and the oxygen processing. There is a critical annealing temperature at which the maximum concentration ratio of Ti to Sr is achieved, while still maintaining a (1 x 1) surface structure. We demonstrate that with proper processing it is possible to avoid surface reconstruction over a broad temperature range. Our results provide an optimal temperature window for epitaxial film growth.

arXiv commentAccepted to Phys. Rev. B

References in corpus (14)

• Interface engineering of quantum Hall effects in digital transition metal oxide heterostructures
• Preparation of atomically-flat SrTiO3 surfaces using a deionized-water etching and thermal annealing procedure
• Control of a two-dimensional electron gas on SrTiO3(111) by atomic oxygen
• Mixed Dimensionality of Confined Conducting Electrons in the Surface Region of SrTiO${}_3$
• Theory of Half-metallic Ferrimagnetism in Double Perovskites
• Orientational tuning of the Fermi sea of confined electrons at the SrTiO3 (110) and (111) surfaces
• Confinement-driven transitions between topological and Mott phases in (LaNiO3)${}_N$/(LaAlO3)${}_M$(111) superlattices
• Polar catastrophe in ultra-thin limit: A case of rare-earth perovskite LaNiO3
• Interaction-induced quantum anomalous Hall phase in (111) bilayer of LaCoO${}_3$
• Lattice distortion effects on topological phases in (LaNiO${}_3$)${}_2$/(LaAlO${}_3$)${}_N$ heterostructures grown along the [111] direction
• Ferroelectric-like SrTiO3 surface dipoles probed by graphene
• Layer-by-layer growth and growth-mode transition of SrRuO3 thin films on atomically flat single-terminated SrTiO3 (111) surfaces
• Surface enhanced covalency and Madelung potentials in Nb doped SrTiO${}_3$ (100), (110) and (111) single crystals
• Termination-dependent Electronic and Magnetic Properties of Ultrathin SrRuO${}_3$ (111) Film on SrTiO${}_3$

Cited by in corpus (2)

• Atomically flat single terminated oxide substrate surfaces
• Manipulating the Polar mismatch at LaNiO3/SrTiO3 (111) Interface