Regensburg 2022 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

O: Fachverband Oberflächenphysik

O 34: Poster Tuesday: Scanning Probe Techniques 2

O 34.5: Poster

Dienstag, 6. September 2022, 11:00–13:00, P3

Design of a high-stability miniaturized scanning tunneling microscope for small-bore cryostats — •Felix Huber, Stephan Spieker, and Sebastian Loth — University of Stuttgart, Institute for Functional Matter and Quantum Technologies, Stuttgart, Germany

Low-temperature scanning tunneling microscopy (STM) setups are typically housed in large cryostats and require proportionally large vacuum chambers, as well as extensively shielded custom-built laboratories to reach the signal-to-noise ratios (SNR) desired for cutting-edge reasearch. Yet, by miniaturizing the STM-head, the SNR can be significantly improved, due to the favorable scaling of resonance frequencies [1], thermal characteristics and the cryostat hold time. The STM design presented here, is optimized to work in noisy environments, provides optical access to the tunnel junction, and can be used in a standard-bore cryogenic dewar due to its small volume and dimensions [2]. This design could be used for experiments requiring long averaging times, and may serve as an easy upgrade to existing room-temperature setups.

[1] C.R. Ast, et al. Rev. Sci. Instrum. 79, 093704 (2008).

[2] R. Schlegel, et al. Rev. Sci. Instrum. 85, 013706 (2014).