منابع مشابه
Surface heterogeneity in KTaO3 (001)
Surface heterogeneity in Ar ion bombarded samples of (001) oriented KTaO3 was studied using (in-situ) electron microscopy and atomic force microscopy. Ion bombardment results in surface damage as well as in offstoichiometry of K and Ta due to the large differences in atomic radii of the two constituent elements and hence different dry etching rates. Subsequent annealing of such samples reduces ...
متن کاملEpitaxial Ag(001) grown on MgO(001) and TiN(001): Twinning, surface morphology, and electron surface scattering
Epitaxial Ag(001) layers were deposited on MgO(001) in order to study electron surface scattering. X-ray reflection indicates 3D layer nucleation with a high rms surface roughness of 1.0 nm for a layer thickness d1⁄4 3.5 nm. X-ray diffraction shows that f111g twins form at d< 11 nm, followed by 2nd generation twinning for 11 nm< d< 120 nm. Increasing the growth temperature from 25 to 150 C supp...
متن کاملSrTiO3(001) surface structures under oxidizing conditions
The thermodynamically stable (2 1), c(4 2) and c(6 2) surface structures were obtained under oxidative conditions on the SrTiO3(0 0 1) surface and studied with transmission electron microscopy. All three reconstructed surfaces exhibit similar morphological features––formation of flat h100i facets on the surface, stabilization of h110i originally polar facets as well as the existence of surface ...
متن کاملSurface resonance on the NiFe(001) alloy surface
First principles calculations based on density-functional theory are used to investigate the geometrical and electronic structure of a NiFe(001) invar surface. We use different ordered as well as alloy fcc-like structures to simulate the system. Ab initio atomic force minimizations show that the (001) invar surface is rumpled; Fe atoms are shifted outwards, Ni atoms inwards. A surface resonance...
متن کاملSurface X-ray speckles: coherent surface diffraction from Au(001).
We present coherent speckled x-ray diffraction patterns obtained from a monolayer of surface atoms. We measured both the specular anti-Bragg reflection and the off-specular hexagonal reconstruction peak for the Au(001) surface reconstruction. We observed fluctuations of the speckle patterns even when the integrated intensity appears static. By autocorrelating the speckle patterns, we were able ...
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ژورنال
عنوان ژورنال: Surface Science
سال: 2017
ISSN: 0039-6028
DOI: 10.1016/j.susc.2016.11.003