Dresden 2011 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 36: Poster Session II (Metals; Nanostructures at surfaces; Surface or interface magnetism; Spin-Orbit Interaction at Surfaces; Electron and spin dynamics; Surface dynamics; Methods; Theory and computation of electronic structure)

O 36.107: Poster

Dienstag, 15. März 2011, 18:30–22:00, P4

NanoESCA, a new nanospectroscopy tool with synchrotron radiation — •Marten Patt¹, Carsten Wiemann¹, Ingo Krug¹, Matthias Escher², Nils Weber², Michael Merkel², and Claus Michael Schneider¹ — ¹PGI-6, Forschungszentrum Jülich GmbH, Jülich, Germany — ²Focus GmbH, Hünstetten, Germany

Nanotechnology and nanoscience are developing more and more to smaller length scales. We face the need for the characterization of surface electronic and magnetic states in these reduced dimensions with a new energy-filtered photoelectron emission microscope (PEEM), which we have recently installed at the ELETTRA synchrotron facility (Italy)[1]. The instrument features a novel electrostatic lens system with 30 kV extraction voltage, enabling spatially resolved photoelectron imaging with a lateral resolution smaller than 100 nm and combines it with a double-hemispherical energy filter [2], a single-event counting detector unit and a liquid helium cooled sample manipulator with five degrees of freedom. A second operation mode provides the mapping of the angular distribution (k-space microscopy) of the photoelectrons. We discuss the capabilities and the performance of the instrument with respect to its lateral and energy resolution, sensitivity and signal-to-noise-ratio.
[1] http://www.elettra.trieste.it/beamlines/NASP
[2] M. Escher et al., J. Electron Spectr. Rel. Phen., 144-147 (2005) 1179