Regensburg 2022 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 80: Focus Session: Atomic-Scale Studies of Spins on Surfaces with Scanning Tunneling Microscopy 3

O 80.5: Vortrag

Freitag, 9. September 2022, 11:30–11:45, S051

Atomic manipulation of spin structures on the β-Bi₂Pd Superconductor — Cristina Mier¹, Divya Jyoti^1,2, Jiyoon Hwang³, Jinkyung Kim³, Yujeong Bae³, Andreas Heinrich³, Nicolas Lorente^1,2, and •Deung-Jang Choi^1,2,4 — ¹Centro de Fisica de Materiales, CFM/MPC (CSIC-UPV/EHU), Paseo Manuel de Lardizabal 5, 20018 Donostia-San Sebastian, Spain — ²Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018 Donostia-San Sebastian, Spain — ³Center for Quantum Nanoscience (QNS), Institute for Basic Science (IBS), Seoul 03760, South Korea — ⁴Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain

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 chiral fashion. We present the first results of controlled single-atom manipulation to assemble a chain of Cr atoms on a β-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.

[1] C. Mier et al., Atomic Manipulation of In-gap States on the β-Bi₂Pd Superconductors, Phys. Rev. B 104 (4), 045406 (2021). [2] Cristina Mier, Deung-Jang Choi and Nicolás Lorente, Phys. Rev. B 104 (24), 245415 (2021).