Dresden 2017 – scientific programme

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O: Fachverband Oberflächenphysik

O 63: Focus Session: Charge Transport at Surfaces and Nanostructures with Multi-probe Techniques

O 63.15: Poster

Tuesday, March 21, 2017, 18:30–20:30, P2-OG3

Koala TetraProbe Multi-Tip STM - Charge Transport Measured at the Nanoscale by a Multi-Tip STM — •Bert Voigtländer, Vasily Cherepanov, and Peter Coenen — mProbes GmbH Jülich, Germany

The ultra-compact Koala TetraProbe STM integrates four independent STM units within a diameter of 50 mm resulting in an unsurpassed mechanical stability, enabling atomic resolution imaging with each tip [1,2]. Each tip and the sample can be positioned independently under control of an optical microscope or an SEM. Software controlled switching between current probe and voltage probe for each tip allows virtually any possible "concerted" spectroscopic measurements involving the four tips and the sample. A four tip STM/AFM combination and a low temperature version are available. Applications include: Local potential measurements on the nanoscale [3], controlled nondestructive measurements in spectroscopy mode, four point measurements with free positionable local probes on structured samples [4], and measurements of the surface conductivity [5].

[1] www.mprobes.com; [2] V. Cherepanov, E. Zubkov, H. Junker, S. Korte, M. Blab, P. Coenen, B. Voigtländer, Rev. Sci. Instrum. 83 (2012) 033707; [3] F. Lüpke, S. Korte, V. Cherepanov, B. Voigtländer, Rev. Sci. Instrum. 86 (2015) 123701; [4] S. Korte, M. Steidl, W. Prost, V. Cherepanov, B. Voigtländer, W. Zhao, P. Kleinschmidt, .T. Hannappel, Appl. Phys. Lett. 103 (2013) 143104; [5] S. Just, M. Blab, S. Korte, V. Cherepanov, H. Soltner, B. Voigtländer, Phys. Rev. Lett. 115 (2015) 066801.