Regensburg 2007 – scientific programme

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O: Fachverband Oberflächenphysik

O 17: Poster Session I (Nanostructures at Surfaces; Metal Substrates: Epitaxy and Growth; Methods: Scanning Probe Techniques; Phase Transitions)

O 17.45: Poster

Monday, March 26, 2007, 17:30–20:30, Poster C

A scanning tunneling microscope for application at 300 mK and 14 T. — •Viktor Geringer, Stefan Becker, Torge Mashoff, Marcus Liebmann, and Markus Morgenstern — II. Physikalisches Institut B, RWTH Aachen, Otto-Blumenthal-Straße, 52074 Aachen

We present a scanning tunneling microscope (STM) for operation at 300 mK in ultra high vacuum (UHV) and at magnetic fields of up to 14 T. The STM features two linear piezo drives with slip-stick mechanism: a z-approach motor for the piezo scanner and a x-y-positioning drive for the sample stage. Furthermore an in situ tip exchange is implemented in the system. The microscope exhibits a very compact and symmetric design to increase stability and resonance frequencies. We discuss the design concept and present first measurements at room temperature.