STM observation of steps and terraces on tungsten (2 1 1) surface

Thermally cleaned W(2 1 1) surface with 0.7° miscut consists of (2 1 1) terraces separated by monoatomic steps. When the surface is exposed to oxygen and subsequently annealed at 1100–1900 K, the width of (2 1 1) terraces increases and multilayer steps are formed. Similar step bunching is observed d...

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Veröffentlicht in:	Ultramicroscopy 2003-05, Vol.95 (1-4), p.165-169
Hauptverfasser:	Zuber, S.M, Szczudło, Z, Szczepkowicz, A, Losovyi, Ya.B, Ciszewski, A
Format:	Artikel
Sprache:	eng
Schlagworte:	Adsorption Condensed matter: structure, mechanical and thermal properties Electron, ion, and scanning probe microscopy Exact sciences and technology Oxygen Physics Reconstruction Scanning probe microscopy: scanning tunneling, atomic force, scanning optical, magnetic force, etc Scanning tunneling microscopy Solid surfaces and solid-solid interfaces Structure of solids and liquids crystallography Surface energy thermodynamic properties Surface topography Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties) Tungsten
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Beschreibung
Zusammenfassung:	Thermally cleaned W(2 1 1) surface with 0.7° miscut consists of (2 1 1) terraces separated by monoatomic steps. When the surface is exposed to oxygen and subsequently annealed at 1100–1900 K, the width of (2 1 1) terraces increases and multilayer steps are formed. Similar step bunching is observed during routine cleaning of the sample by annealing in oxygen and thermal flashing in ultra high vacuum. During such cleaning procedure islands of c(6×4) reconstruction are observed.
ISSN:	0304-3991 1879-2723
DOI:	10.1016/S0304-3991(02)00313-3