Ge clusters in Si matrix: structure and dynamics
نویسندگان
چکیده
منابع مشابه
Structure, strain and stability of ultra-thin Ge layers in Si/Ge/Si axial heterojunction nanowires
The abrupt heterointerfaces in the Si/Ge materials system presents useful possibilities for electronic device engineering because the band structure can be affected by strain induced by the lattice mismatch. In planar layers, heterointerfaces with abrupt composition changes are difficult to realize without introducing misfit dislocations. However, in catalytically grown nanowires, abrupt hetero...
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W. Wulfhekel,1,2 B. J. Hattink,1 H. J. W. Zandvliet,1 Georg Rosenfeld,3 and Bene Poelsema1 1Faculty of Applied Physics and Centre of Materials Research, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands 2Institut für Grenzflächenforschung und Vakuumphysik, Forschungszentrum Jülich, 52425 Jülich, Germany 3Institut für Physikalische und Theoretische Chemie, Universität Bonn, W...
متن کاملCompeting growth mechanisms of Ge/Si„001... coherent clusters
The growth of Ge three-dimensional coherent clusters on Si~001! during gas source molecular-beam epitaxy and post-deposition anneals has been investigated using in situ elevated-temperature scanning tunneling microscopy. By monitoring the growth of individual so-called ‘‘hut’’ clusters, this technique allowed us to separate various factors that may affect the final size distribution of entire c...
متن کاملKinetically suppressed ostwald ripening of Ge/Si(100) hut clusters.
Low area density Ge/Si(100) hut cluster ensembles are stable during days-long growth temperature anneals. Real-time scanning tunneling microscopy shows that all islands grow slowly at a decreasing rate throughout the anneal. Island growth depletes the Ge supersaturation that, in turn, reduces the island growth rate. A mean-field facet nucleation and growth model quantitatively predicts the obse...
متن کاملStructure and optical properties of reconstructed Si and Ge surfaces
When a crystal is cut in a specific direction the surface of the system differs from the bulk as the forces on the bulk atoms are not similar to those on surface atoms. This is called surface reconstruction. When these systems are energetically relaxed, sometimes they form special ordered structures such as one dimensional atomic chains or rows of dimers etc. due to surface reconstruction. Syst...
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ژورنال
عنوان ژورنال: The European Physical Journal B
سال: 1999
ISSN: 1434-6028
DOI: 10.1007/s100510051014