Detecting faint magnetic fields from single-electron and nuclear spins at the atomic scale is challenging. This paper presents a single-molecule quantum sensor fabricated at the apex of a scanning tunneling microscope (STM) tip by attaching Fe atoms and a PTCDA molecule. Using electron spin resonance (ESR), the sensor achieves ~100 neV energy resolution and measures magnetic and electric dipole fields from a single Fe atom and an Ag dimer with sub-angstrom spatial resolution. The method enables atomic-scale quantum sensing experiments on conducting surfaces and has potential applications in various fields.
Publisher
Nature Nanotechnology
Published On
Jul 25, 2024
Authors
Taner Esat, Dmitriy Borodin, Jeongmin Oh, Andreas J. Heinrich, F. Stefan Tautz, Yujeong Bae, Ruslan Temirov
Tags
quantum sensor
magnetic fields
atomic scale
electron spin resonance
sub-angstrom resolution
PTCDA molecule
Fe atom
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