Dresden 2014 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
DS: Fachverband Dünne Schichten
DS 45: Poster IV: One-Dimensional Metals: Reality or Fiction
DS 45.14: Poster
Donnerstag, 3. April 2014, 16:00–19:00, P1
Optical and vibrational characterization of gold-induced atomic wires on germanium (001) — •Jochen Räthel1, Eugen Speiser1, Sandhya Chandola1, Arne Baumann1, Norbert Esser1, Utz Bass2, Jean Geurts2, Sebastian Meyer2, Julian Aulbach2, Lenart Dudy2, Jörg Schäfer2, and Ralph Claessen2 — 1Leibniz-Institut für Analytische Wissenschaften – ISAS – e.V., Albert-Einstein-Str. 9, 12489 Berlin — 2Physikalisches Institut and RCCM, Universität Würzburg, Physikalisches Institut, Am Hubland, 97074 Würzburg
Atomic chains formed by metal adsorption on semiconductor surfaces are known as model systems for determining exotic electronic ground states, such as the Tomonaga-Luttinger liquid (TTL). A system of Au-induced atomic wires on the Ge(001) surface has been reported to host such TTL behaviour [1]. Here we present the results of temperature dependent reflection anisotropy spectroscopy (RAS) and Raman spectroscopy (RS) on clean Ge(001) and Au/Ge(001). RAS probes optically surface and surface to bulk electronic transitions between 0.5 and 5 eV with linear polarized light at normal incidence. From polarized RS measurements the vibrational properties of clean Ge(001) and Au/Ge(001) were characterized and in particular surface phonon modes identified. In combination with calculated ab-initio optical and vibrational spectra , the experimental data from RS and RAS provide a basis for structural modeling of these complex surface reconstructions. [1] C. Blumenstein, Nat. Phys. 7, 776 (2011)