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Updated: Mar 17, 2026

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
Published on: January 19, 2018
Generation of constant-amplitude radio-frequency sweeps at a tunnel junction for spin resonance STM
William Paul1, Susanne Baumann1, Christopher P Lutz1
1IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, California 95120, USA.
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.
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