Berlin 2018 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 80: Poster: Scanning Probe Techniques - Method Development

O 80.15: Poster

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

An STM in a Pulse-Tube Refrigerator — •Marcel Rost, Gert Koning, Ko Koning, and Tjerk Oosterkamp — Huygens-Kamerlingh Onnes Laboratory, Leiden University, P.O. Box 9504, 2300 RA Leiden, The Netherlands

The advantage of Pulse-Tube Refrigerators over conventional (wet) ones becomes obvious, if one considers the (future) increase in helium costs as well as the complexity, maintenance, and time investment that is required to run a wet-type refrigerator. However, the clear downside of a pulse-tube-system is the acoustical and mechanical noise introduced by the pulsing pump.

Although we have successfully shown earlier that it is possible to obtain atomic resolution on HOPG with an STM in our system, the real demonstration, however, is obtaining at least full atomic resolution on a closed packed fcc(111) surface! Here we show our current approach, the modifications of the STM, and present the latest results.