« Investigation of Single Atom Magnets using Scanning Tunneling Microscopy enabled Electron Spin Resonance »
Fabian D. Natterer
Physik-Institut, University of Zurich
The smallest classical storage unit is a single atom bit. Its recent discovery in form of magnetically bistable holmium single atom magnets on MgO exemplified how miniaturization could be realized down to fundamental limits . Here we discuss the experiments leading to the observation of magnetic remanence1, the reading and writing of single atom magnets , and the investigation of their thermal and magnetic stability . Using STM enabled electron spin resonance [4,5], we find a magnetic moment of (10.1±0.1) Bohr magnetons and we prove the magnetic origin of the tunneling bias voltage dependent 2-state switching observed with spin-polarized current. We briefly review the used measurement concept of ESR-STM and illustrate new avenues for this technique. F. Donati et al., “Magnetic remanence in single atoms”. Science 352, 318 (2016).
 F.D. Natterer et al., “Reading and writing single-atom magnets”. Nature 543, 228 (2017).
 F.D. Natterer et al., Phys. Rev. Lett. 121, 027201 (2018).
 S. Baumann et al., Science 350, 417 (2015).
 F.D. Natterer et al.,. ArXiv181003887 Cond-Mat Physics (2018).