Regensburg 2022 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 31: Superconducting Electronics and Cryogenics: Poster Session

TT 31.26: Poster

Donnerstag, 8. September 2022, 15:00–18:00, P1

Navigation system for a low temperature STM — •Timo Kandra, Roman Hartmann, Marcel Strohmeier, Sara Khorshidian, and Elke Scheer — University of Konstanz, Germany

To obtain spatially resolved spectroscopic information in laterally confined superconducting heterostructures, such as nanowires and flakes on insulating substrates, tunneling spectroscopy on distinct locations on those structures shall be performed. For this purpose a coarse approach system is needed that allows to locate the STM tip at the point of interest without crashing the tip and while operating at very low temperature, here, 300 mK. We developed a braille-like pattern that allows to determine the absolute position of the tip within a 100x100 µm² scan range by scanning any area of size 1x1µm². The search structure made of gold is patterned by electron beam lithography and is realized by a topographical pattern composed of squares. With this method it is possible to navigate to the point of interest by using an xy-table.