Berlin 2024 – scientific programme
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O: Fachverband Oberflächenphysik
O 110: Surface Magnetism
O 110.2: Talk
Friday, March 22, 2024, 10:45–11:00, MA 144
Probing In-Gap States: Unveiling Pathways to Topological Superconductivity — •Deung-Jang Choi1,2,3, Jinkyung Kim4, Wonjun Jang4, Yujeong Bae4, Andreas Heinrich4, and Nicolas Lorente1,2 — 1Centro de Física de Materiales CFM/MPC (CSIC-UPV/EHU), 20018 Donostia-San Sebastián, Spain — 2Donostia International Physics Center (DIPC), 20018 Donostia-San Sebastián, Spain. — 3Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain — 4Center for Quantum Nanoscience, Institute for Basic Science (IBS), Seoul 03760, Korea
Lately, there has been a growing interest in the introduction of impurity states within the superconducting energy gap. Notably, the pursuit of a novel superconducting state known as topological superconductivity heavily relies on creating nanostructures with magnetic impurities on conventional (s-wave) superconductors that arrange spins in a chiral manner. Our study presents the initial findings resulting from the deliberate manipulation of individual atoms, enabling the construction of a chain of Cr atoms on a Bi2Pd superconductor [1,2,3]. These magnetic impurities, situated on diverse substrates, provide an unique opportunity to investigate various many-body effects and unconventional phenomena within different experimental spin systems. This research contributes to an enhanced comprehension of the underlying parameters governing each distinct system. References: [1] Phys. Rev. B 104 (4), 045406 (2021). [2] Phys. Rev. B 104 (24), 245415 (2021). [3] Phys. Rev. Research 4, L032010 (2022).
Keywords: Topological superconductivity; Atomic manipulation; Quantum engineering; One dimensional spin chain