Frequency-independent voltage amplitude across a tunnel junction

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.

arXiv commentThis replacement article is the final version published in Review of Scientific Instruments. It has been shortened to three pages by omitting the appendices. The appendices can be found in the previous version

References in corpus (4)

• Reading and Writing Single-Atom Magnets
• Single-atom electron paramagnetic resonance in a scanning tunneling microscope driven by a radiofrequency antenna at 4 K
• Upgrade of a low-temperature scanning tunneling microscope for electron-spin resonance
• Mechanism for nuclear and electron spin excitation by radio frequency current