SurfaceScience21 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 95: Poster Session VII: Poster to Mini-Symposium: Manipulation and control of spins on functional surfaces III
O 95.5: Poster
Donnerstag, 4. März 2021, 10:30–12:30, P
Probing the anisotropy of g-factor of a single atom on a surface in vector magnetic fields — •Thi Hong Bui1,2, Jinkyung Kim1,2, Won-jun Jang3, Denis Krylov1, Soonhyeong Lee1, Sangwon Yoon1, Deung-jang Choi4, Christoph Wolf1, Fernando Delgado5, Chris P. Lutz6, Andreas J. Heinrich1,2, and Yujeong Bae1,2 — 1Center for Quantum Nanoscience, Institute for Basic Science, Seoul, South Korea — 2Department of Physics, Ewha Womans University, Seoul, South Korea — 3Nano Electronics Lab, Samsung Advanced Institute of Technology, Suwon 13595, South Korea — 4Material Physics Center (UPV/EHU), 20018 Donostia-San Sebastian, Spain Donostia International Physics Center (DIPC), Spain — 5Instituto de estudios avanzados IUDEA, Departamento de Fisica, Universidad de La Laguna, 38203, Tenerife, Spain — 6IBM Almaden Research Center, San Jose, CA 95120, USA
Combining the electron spin resonance with the scanning tunneling microscope enables us to approach to the quantum states of single atoms on a surface with the energy resolution of sub-nano electron volts [1]. Here, we report the huge anisotropy of a hydrogenated titanium (Ti) atom at a lower symmetry binding site on MgO/Ag(100) studied using a mK ESR-STM in a vector magnetic field. We were able to determine the three components of g-factor. Interestingly, we observed the magnitude of the ESR signal significantly changes depending on the angle of the external magnetic vector, which can be attributed to the correlation between the relative orientation of the tip spin and the Ti spin. [1] S. Baumann et al., Science 350, 417 (2015)