Regensburg 2019 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 84: Focus Session: Spins on Surfaces II (joint session O/MA)
O 84.11: Vortrag
Donnerstag, 4. April 2019, 17:45–18:00, H15
Hyperfine interaction of individual atoms on a surface — •Philip Willke1,2,3, Yujeong Bae1,2,3, Kai Yang3, Jose Lado4,5, Alejandro Ferrón6, Taeyoung Choi1,2, Arzhang Ardavan7, Joaquín Fernández-Rossier4, Andreas Heinrich1,2, and Christopher Lutz3 — 1Center for Quantum Nanoscience, Seoul, Republic of Korea — 2Ewha Womans University, Seoul, Republic of Korea — 3IBM Almaden Research Center, San Jose, USA — 4International Iberian Nanotechnology Laboratory, Braga, Portugal — 5ETHZ, Zurich, Switzerland — 6Universidad Nacional del Nordeste, Corrientes, Argentina — 7University of Oxford, Oxford, UK
The combination of electron spin resonance (ESR) with scanning tunneling microscopy (STM) enabled spin resonance on individual atoms on surfaces [1]. Making use of the increased energy resolution of ESR-STM we can resolve and control the hyperfine interaction of single atoms [2]. Using atom manipulation we find that the hyperfine interaction strongly depends on the binding configuration of the atom as well as the proximity to other magnetic atoms. This allows us to extract atom- and position-dependent information about the electronic ground state as well as properties of the nuclear spin.
Moreover, we show that the populations of the nuclear spin states can be controlled by utilizing the spin-polarized tunnel current [3].
S. Baumann et al., Science 350 (2015). [2] P. Willke et al., Science 362 (2018). [3] K. Yang, PW, et al., Nature Nano (2018).