Dresden 2020 – wissenschaftliches Programm
Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 30: Poster Session - Surface Magnetism
O 30.4: Poster
Montag, 16. März 2020, 18:15–20:00, P1A
Demonstration of single atom ESR and pump-probe with a 30 mK STM setup — •Werner M.J. van Weerdenburg1, Manuel Steinbrecher1, Niels P.E. van Mullekom1, Jan W. Gerritsen1, Fabian D. Natterer2, and Alexander A. Khajetoorians1 — 1IMM, Radboud University Nijmegen, the Netherlands — 2Physik Institut, University of Zurich, Switzerland
The recent advances in electron spin resonance (ESR) with STM have allowed the detection of low-energy spin excitations with neV energy resolution on a single atom [1]. Combined with all-electrical pump-probe schemes, these methods have been used to probe spin relaxation times [2,3] and decoherence times [4] in the nanosecond regime.
Here, we demonstrate the implementation of ESR and all-electrical pump-probe on a 30 mK STM. By measuring the transmission of rf voltages and doing pulse shape analysis, we characterize the time-domain performance of our setup. We extract the magnetic moments of Fe on MgO/Ag(100) from the linear progression of the ESR resonance in field-sweep and frequency-sweep mode. With pump-probe schemes [5], we also reproduce comparable lifetimes for Fe on MgO/Ag(100) [3] and show how these are affected by an externally applied in-plane and out-of-plane magnetic field.
[1] S. Baumann et al., Science 350, 417-420 (2015)
[2] S. Loth et al., Science 329, 1628-1630 (2010)
[3] W. Paul et al., Nature Physics 13, 403-407 (2017)
[4] K. Yang et al., Science 366, 509-512 (2019)
[5] F. Natterer, ArXiv. 1902.05609 (2019)