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O: Fachverband Oberflächenphysik

O 104: Poster Session VIII: Scanning probe techniques: Method development III

O 104.4: Poster

Thursday, March 4, 2021, 13:30–15:30, P

Single Atom Electron Spin Resonance Spectroscopy at High Magnetic Fields — •Piotr Kot, Robert Drost, Maximilian Uhl, and Christian Ast — Max Planck Institute for Solid State Research, Stuttgart, DE

In the last several years electron spin resonance spectroscopy (ESR) and scanning tunneling microscopy (STM) have been combined, introducing a new technique for studying spin dynamics on the atomic scale. Here, we present a next-generation ESR-STM with operating frequencies between 60GHz and 90GHz, which allows us to probe larger Zeeman energies than what has been previously reported. The instrument operates at a base temperature of 300mK, much lower than typical Zeeman energies in the operational frequency range. Spin systems are therefore thermally initialised to their ground state. We envision to take advantage of this to maximise the ESR-STM signal and ultimately implement coherent control at the nanoscale.