Dresden 2020 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 72: Scanning Probe Techniques I: STM-ESR and Method Development (joint session O/CPP)

O 72.4: Vortrag

Mittwoch, 18. März 2020, 15:45–16:00, TRE Ma

Electron spin resonance in scanning tunneling microscopy — •Andreas Heinrich — Center for Quantum Nanoscience, Seoul, Korea

The scanning tunneling microscope is an amazing tool because of its atomic-scale spatial resolution. This can be combined with the use of low temperatures, culminating in precise atom manipulation and spectroscopy with several microvolt energy resolution. In this talk we will apply these techniques to the investigation of the quantum spin properties of magnetic atoms sitting on thin insulating films. We will explore the superposition of quantum states which is inherent to spin resonance techniques. About 5 years ago it was demonstrated that electric field driven electron spin resonance (ESR) can be combined with STM on single Fe atoms on MgO (Science 2015). This technique combines the power of STM of atomic-scale spectroscopy with the unprecedented energy resolution of spin resonance techniques, which is about 10,000 times better than normal spectroscopy. We will give an update on recent advances in our team including pulsed ESR on Ti atoms on MgO (Science 2019).