Berlin 2015 – scientific programme
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O: Fachverband Oberflächenphysik
O 37: Scanning Probe Techniques
O 37.6: Poster
Tuesday, March 17, 2015, 18:15–21:00, Poster A
Performance of the mK-STM in the new Precision Laboratory — •Jacob Senkpiel1, Bertholt Jäck1, Matthias Eltschka1, Wolfgang Stiepany1, Markus Etzkorn1, Christian R. Ast1, and Klaus Kern1,2 — 1Max-Planck-Institute for Solid State Research, D-70569 Stuttgart — 2Ècole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne
External vibrational and electromagnetic noise can yield a strong influence on the data quality of high precision experiments, like e.g., spectroscopic measurements of a superconducting gap with a scanning tunneling microscope (STM). Especially when pushing the frontier of resolution, these factors become a crucial point to consider. Here, an STM operating at a temperature of 10 mK for which Assig et al. [1] demonstrated an energy resolution of Δ E=11.4±0.3 µeV is used for probing the smallest energy scales. The influence of external noise on this system was minimized by moving it from a standard lab environment to a specially designed Precision Laboratory. The performance of the mK-STM due to the optimized vibrational damping and high level electromagnetic shielding are presented.
[1] M. Assig et al., Rev. Sci. Instrum. 84, 033903 (2013)