Berlin 2018 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 80: Poster: Scanning Probe Techniques - Method Development

O 80.13: Poster

Mittwoch, 14. März 2018, 18:15–20:30, Poster A

Tests and first results of an RF-compatible UHV-based multiprobe-STM system — •Jonas Koch, Jonas Harm, Johannes Friedlein, Maciej Barzanik, Stefan Krause, and Roland Wiesendanger — Dept. of Physics, University of Hamburg, Hamburg, Germany

We present the concept of a 3 -tip multiprobe scanning tunneling microscope (MP-STM), which achieves picosecond time resolution by the use of RF technology. The evaluation of the microscope’s performance is carried out in ultra-high vacuum (UHV) and at variable temperatures from 30 K up to room temperature. For this purpose we have designed a vibration-damped UHV setup equipped with electrical RF feedthroughs (for up to 40 GHz). The tests focus on the thermal coupling of individual components, in particular the RF cabling, and on the vibration decoupling from external noise sources. Furthermore, we analyzed the behavior of the coarse drive in x-, y- and z-direction for each of the three scanners at low temperatures. First results of the 3 -tip multiprobe-STM will be presented.