Determination of the α-Ai2O3(0001) Surface Relaxation and Termination by Measurements of Crystal Truncation Rods-Reference-Cited by-同舟云学术

Determination of the α-Ai2O3(0001) Surface Relaxation and Termination by Measurements of Crystal Truncation Rods

Published:1998-02 Issue:01 Volume:05 Page:321-324
ISSN:0218-625X
Container-title:Surface Review and Letters
language:en
Short-container-title:Surf. Rev. Lett.

Author:

Guénard P.¹,Renaud G.¹,Barbier A.¹,Gautier-Soyer M.²

Affiliation:

1. CEA/Grenoble, Département de Recherche Fondamentale sur la Matière Condensée, Grenoble, France

2. CEA/Saclay, Département de Recherche sur l'Etat Condensé, les Atomes et Molécules, Gif-sur-Yvette, France

Abstract

We have investigated the unreconstructed (0001) surface structure of sapphire (α- Al 2 O 3) by grazing incidence X-ray scattering. Modulations along the crystal truncation rods were analyzed in order to determine the chemical nature of the terminating plane, and the structural relaxations of the first few atomic planes below the surfoce. The most likely model yields a single Al layer termination with relaxations of the first four planes of -51%, +16%, -29% and +20% respectively. These results compare well with the most recent theoretical calculations on this surface.

Publisher

World Scientific Pub Co Pte Lt

Subject

Materials Chemistry,Surfaces, Coatings and Films,Surfaces and Interfaces,Condensed Matter Physics

Link

https://www.worldscientific.com/doi/pdf/10.1142/S0218625X98000591

Reference11 articles.

1. Electronic structure and energetics of sapphire (0001) and (11¯02) surfaces

2. The morphology of α-Al2O3 and α-Fe2O3: The importance of surface relaxation

3. Structure and Energetics of Alumina Surfaces Calculated from First Principles

4. Ab initio characterization of the (0001) and (101̄0) crystal faces of α-alumina

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