Step bunching on TaC(910) due to attractive step-step interactions
نویسندگان
چکیده
منابع مشابه
The influence of step-step interactions on step wandering
We derive relationships between the amount of step wandering and the strength of step-step interactions to aid interpretation of scanning tunneling microscopy images of steps on surfaces. We make contact with well-established results for the statistical mechanics of interfacial wandering. In particular, we use the analogy between a step meandering in a potential and a quantum-mechanical particl...
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The step-step interactions on vicinal GaAs (110) surface patterns have been extracted from the quantitative analysis of the terrace width distribution (TWD). We have specifically studied the interactions in near-equilibrium faceting and kinetics-driven step bunching and meandering formed by spontaneous self-organization or through the modification of GaAs growth kinetics by atomic hydrogen. We ...
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– Codeposition of impurities during the growth of a vicinal surface leads to an impurity concentration gradient on the terraces, which induces corresponding gradients in the mobility and the chemical potential of the adatoms. Here it is shown that the two types of gradients have opposing effects on the stability of the surface: Step bunching can be caused by impurities which either lower the ad...
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We use a one-dimensional step model to study quantitatively the growth of step bunches on Si~111! surfaces induced by a direct heating current. Parameters in the model are fixed from experimental measurements near 900 °C under the assumption that there is local mass transport through surface diffusion and that step motion is limited by the attachment rate of adatoms to step edges. The direct he...
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When a heteroepitaxial film is grown on a vicinal substrate, the terrace steps at the growth front may bunch together to relieve strain, resulting in a rough surface. On the other hand, proper manipulation of the growth kinetics may suppress the inherent bunching instability, thus preserving step-flow growth. Here we show that the step dynamics in the early stages of growth can already determin...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2001
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.63.033404