Dresden 2014 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 80: Surface Dynamics I

O 80.4: Vortrag

Donnerstag, 3. April 2014, 16:45–17:00, GER 38

Ultrafast electron dynamics in Pb nanowire arrays on Si(557)Abdul Samad Syed1, Vesna Mikšić Trontl1, •Manuel Ligges1, Mathias Sandhofer1, Ishita Agarwal1, Isabella Avigo1, Daniel Lükermann2, Christoph Tegenkamp2, Herbert Pfnür2, and Uwe Bovensiepen11Fakultät für Physik, Univ. Duisburg-Essen — 2Institut für Festkörperphysik, Leibnitz Univ. Hannover

Quasi-1D materials are expected to exhibit exotic properties that are considerably different from those of their corresponding bulk material counterparts. As a consequence of the strong real-space anisotropy of these systems, significant differences in, e.g., electron scattering rates along and perpendicular to the wire structure can be expected. We investigate this particular aspect using time- and angle-resolved two photon photoemission from the Pb/Si(557) nanowire system. We present results regarding the unoccupied electronic structure and ultrafast relaxation of optically excited carriers probed as a function of two mutually independent in-plane momentum directions along and perpendicular to the nanowire orientation. We gratefully acknowledge funding by the DFG through FOR1700.

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