SurfaceScience21 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 81: Poster Session VI: Poster to Mini-Symposium: Manipulation and control of spins on functional surfaces II
O 81.2: Poster
Mittwoch, 3. März 2021, 13:30–15:30, P
A scanning tunneling microscope capable of electron spin resonance and pump-probe spectroscopy at mK temperature and in vector magnetic field — •Werner M.J. van Weerdenburg1, Manuel Steinbrecher1, Niels P.E. van Mullekom1, Jan W. Gerritsen1, Henning von Allwörden1, Fabian D. Natterer2, and Alexander A. Khajetoorians1 — 1Institute for Molecules and Materials, Radboud University Nijmegen, the Netherlands — 2Department of Physics, University of Zürich, Switzerland
Recent advances in detecting atomic spin dynamics have combined techniques like electron spin resonance (ESR) and pump-probe spectroscopy with scanning tunneling microscopy (STM). Such methods have been employed to detect small magnetic interactions, and spin relaxation and coherence times in the nanosecond regime.
Here, we demonstrate the implementation of ESR and all-electrical pump-probe spectroscopy in a dilution-refridgerator (DR) STM, equipped with a vector magnetic field [1]. The efficient cooling of the DR permits the use of appreciable RF amplitudes at the STM junction while remaining at mK base temperature. We measure ESR resonances of a single TiH molecule on MgO/Ag(100) in an unprecedented low frequency band [2], enabled by the mK temperature, and use pump-probe spectroscopy to study the spin relaxation time of single Fe atoms on MgO/Ag(100) in a vector magnetic field.
[1] W. van Weerdenburg et al., arXiv:2007.01835v2;
[2] M. Steinbrecher et al., arXiv:2007.01928