Frequency-independent voltage amplitude across a tunnel junction

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 th...

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Bibliographic Details
Published in:arXiv.org 2021-04
Main Authors: Feigl, Simon, Vranik, Radovan, Wit, Bareld, Müllegger, Stefan
Format: Article
Language:English
Subjects:
Amplitudes
Attenuation
Calibration
Electric potential
Radio frequency
Spin resonance
Transfer functions
Transmission lines
Tunnel junctions
Voltage
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.2011.12673