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O: Fachverband Oberflächenphysik
O 28: Poster Session - Scanning Probe techniques: Method Development
O 28.9: Poster
Montag, 16. März 2020, 18:15–20:00, P1A
Design of a high-stability miniaturized STM — •Felix Huber1, Stephan Spieker1, and Sebastian Loth1,2 — 1University of Stuttgart, Institute for Functional Matter and Quantum Technologies, Stuttgart, Germany. — 2Max Planck Institute for Solid State Research, Stuttgart, Germany.
State-of-the-art low-temperature scanning tunneling microscopy setups are typically housed in large cryostats, require proportionally large vacuum chambers, as well as extensively shielded custom built laboratories to reach the signal-to-noise ratios (SNR) required for cutting-edge experiments. However, by miniaturizing the STM-head, the SNR can be significantly improved, due to the favorable scaling of resonant frequency [1], thermal characteristics, and measurement time. The STM design presented here is optimized to work in noisy environments, and due to its small volume and dimensions can be used in a standard bore cryogenic dewar [2]. The setup is designed for long hold times, as well as for a short turn-around, allowing for rapid sample preparation and characterization. This design could be used for extended averaging experiments, or it could be utilized as an easy upgrade to existing UHV setups.
[1] Ast, C. R., Assig, M., Ast, A. & Kern, K. Design criteria for scanning tunneling microscopes to reduce the response to external mechanical disturbances. Rev. Sci. Instrum. 79, 093704 (2008).
[2] Schlegel, R. et al. Design and properties of a cryogenic dip-stick scanning tunneling microscope with capacitive coarse approach control. Review of Scientific Instruments 85, 013706 (2014).