Bismuth on GaSb(110): Structural Determination of the 1×1 and 1×2 Phases by Surface X-Ray Diffraction

Autor:	E. Landemark, Detlef-M. Smilgies, T. van Gemmeren, L. Lottermoser, O. Bunk, Robert L. Johnson, Mourits Nielsen, Robert Feidenhans'l
Rok vydání:	1998
Předmět:	Materials science chemistry.chemical_element Surfaces and Interfaces Substrate (electronics) Condensed Matter Physics Epitaxy Surfaces Coatings and Films Bismuth Crystallography Zigzag chemistry Phase (matter) Monolayer X-ray crystallography Materials Chemistry Layer (electronics)
Zdroj:	Surface Review and Letters. :1043-1052
ISSN:	1793-6667 0218-625X
Popis:	The surface geometry of the 1×1 and 1×2 phases of bismuth on GaSb(110) has been determined using surface X-ray diffraction with synchrotron radiation. The bismuth atoms form zigzag chains along the [Formula: see text] direction of the substrate. For the 1×1 phase four different registries of the bismuth chains with respect to the GaSb(110) substrate are possible. It was found that only the epitaxial continued layer structure was in good agreement with the experimental data. In the 1×2 reconstruction every second zigzag chain in the uppermost substrate layer is missing. The reconstructed surface is terminated with a full monolayer of Bi atoms which also form zigzag chains. The Bi atoms in the chains bond alternately to the first and second layer substrate atoms and the Bi chains are inclined at 34° to the surface. This new structural model explains the higher thermal stability of the 1×2 phase compared to that of the 1×1 phase.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cca4c4590b3f3480b1a21a660878d946 https://doi.org/10.1142/s0218625x98001419 Zobrazit plný text záznamu