Regensburg 2010 – scientific programme
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O: Fachverband Oberflächenphysik
O 59: Poster Session II (Nanostructures at surfaces: Dots, particles, clusters; Nanostructures at surfaces: arrays; Nanostructures at surfaces: Wires, tubes; Nanostructures at surfaces: Other; Plasmonics and nanooptics; Metal substrates: Epitaxy and growth; Metal substrates: Solid-liquid interfaces; Metal substrates: Adsoprtion of organic / bio molecules; Metal substrates: Adsoprtion of inorganic molecules; Metal substrates: Adsoprtion of O and/or H; Metal substrates: Clean surfaces; Density functional theory and beyond for real materials)
O 59.19: Poster
Wednesday, March 24, 2010, 17:45–20:30, Poster B1
Iron-Induced Reconstructions on the Ge(001) Surface: a Scanning Tunneling Microscopy Study — •Michael Lochner1,2, Christian Blumenstein1, Jörg Schäfer1, and Ralph Claessen1 — 1Physikalisches Institut, Universität Würzburg, 97074 Würzburg — 2Fachbereich Naturwissenschaften, Universität Kassel, 23132 Kassel
Low-dimensional systems can be realized by self-organized arrays of adatoms on semiconductor surfaces. In the last years, significant advances have been made in the growth and spectroscopy of nanowire systems, especially on Ge(001). A fascinating and still open question is whether one can grow such structures with magnetic atoms, which might lead to spin-ordered chains.
Here we study the growth of Fe atoms on Ge(001) by scanning tunneling microscopy (STM). Deposition of Fe at ∼ 400∘C substrate temperature leads to formation of two different Fe-induced reconstructions: A (2×1) reconstruction exhibiting chain-like character, and a c(4×2) reconstruction that shows a two-dimensional architecture. The structural features for both phases as seen in STM, as well as their occurence in the phase diagram will be discussed in detail.