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arXiv · 2011.12673

Frequency-independent voltage amplitude across a tunnel junction

Simon Feigl·Radovan Vranik·Bareld Wit·Stefan Müllegger
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Abstract

Radio-frequency (rf) scanning tunneling microscopy has recently been advanced to methods such as single-atom spin resonance. Such methods benefit from a frequency-independent rf voltage amplitude across the tunnel junction, which is challenging to achieve due to the strong frequency dependence of the rf attenuation in a transmission line. Two calibration methods for the rf amplitude have been reported to date. In this Note, we present an alternative method to achieve a frequency-independent rf voltage amplitude across the tunnel junction and show the results of this calibration. The presented procedure is applicable to devices that can deliver rf voltage to a tunnel junction.

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Simon Feigl, Radovan Vranik, Bareld Wit, Stefan Müllegger. 2020-11-25. Frequency-independent voltage amplitude across a tunnel junction. https://doi.org/10.1063/5.0035388

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