21.9.2020, 10:00 CEST:
Deung-Jang Choi
Materials Physics Center, San Sebastián, Spain
Atomic spin structures on surfaces
Scanning tunneling microscopy (STM) has proved to be a mature technique for the study of magnetic impurities on different substrates. Additionally, the STM allows us to manipulate atoms and assemble magnetic structures of atomic dimensions that are going to behave differently depending on their geometrical and chemical environment. We have applied our techniques to the study of magnetic spectra on atomic spin structures not only on metallic system [1] but also on superconducting surfaces [2,3] revealing the topological properties [4]. Such magnetic impurities on different substrates allow us to explore many-body effects and exotic phenomena in different experimental spin systems giving us an understanding on the parameters on each system.[1] Choi D.-J., et al. Building Complex Kondo Impurities by Manipulating Entangled Spin Chains, Nano Lett., 17 (10), pp 6203–6209 (2017).[2] Choi D.-J., et al. Mapping the orbital structure of impurity bound states in a superconductor. Nat. Commun. 8, 15175 (2017).[3] Choi D.-J., et al. Influence of Magnetic Ordering between Cr Adatoms on the Yu-Shiba-Rusinov States of the β-Bi2Pd superconductor, Phys. Rev. Lett., 120(16), 167001 (2018).[4] Mier C., Verlhac B., Garnier L., Robles R., Limot L., Lorente N., and Choi D. J., Molecular templates of spin textures on superconducting surface, submitted, http://arxiv.org/abs/2009.00501 (2020).