Deung–Jang Choi – Centro de Fisica de Materiales, CFM/MPC (CSIC–UPV/EHU), Donostia International Physics Center (DIPC), Ikerbasque, Basque Foundation for Science,
INSP – Sorbonne Université – 4 place Jussieu – 75005 Paris – Barre 22-32, 2e étage, salle 201
Recently, the introduction of impurity states in the superconducting gap has received a lot of attention. Indeed, the search of a new superconducting state called topological superconductivity is strongly based in the combination of doping classical (s-wave) superconductors with magnetic impurities that arrange spins in a special order. We present our first results of controlled single-atom manipulation to assemble a chain of Cr atoms on a Bi2Pd superconductor [1,2]. Such magnetic impurities on different substrates allow us to explore many-body effects and exotic phenomena in different experimental spin systems giving an understanding on the parameters on each system.
 Mier C., Hwang J., Kim J., Bae Y., Nabeshima F., Imai Y., Maeda A., Lorente N., Heinrich A. and Choi
D.-J., Atomic Manipulation of In-gap States on the ꞵ-Bi2Pd Superconductors, Physical Review B 104 (4), 045406 (2021).