Generation of constant-amplitude radio-frequency sweeps at a tunnel junction for spin resonance STM

William Paul, Susanne Baumann, Christopher P. Lutz, Andreas J. Heinrich

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29 Scopus citations

Abstract

We describe the measurement and successful compensation of the radio-frequency transfer function of a scanning tunneling microscope over a wide frequency range (15.5-35.5 GHz) and with high dynamic range (>50 dB). The precise compensation of cabling resonances and attenuations is critical for the production of constant-voltage frequency sweeps for electric-field driven electron spin resonance (ESR) experiments. We also demonstrate that a well-calibrated tunnel junction voltage is necessary to avoid spurious ESR peaks that can arise due to a non-flat transfer function.

Original languageEnglish
Article number074703
JournalReview of Scientific Instruments
Volume87
Issue number7
DOIs
StatePublished - 1 Jul 2016

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