Interplay between pairing and correlations in spin-polarized bound states

• Main Authors: Szczepan Głodzik, Aksel Kobiałka, Anna Gorczyca-Goraj, Andrzej Ptok, Grzegorz Górski, Maciej M. Maśka, Tadeusz Domański
• Format: Article
• Language: English
• Published: Beilstein-Institut 2018-05-01
• Series: Beilstein Journal of Nanotechnology
• Subjects: bound states in superconductors; Majorana quasiparticles; subgap Kondo effect
• Online Access: https://doi.org/10.3762/bjnano.9.129

We investigate single and multiple defects embedded in a superconducting host, studying the interplay between the proximity-induced pairing and interactions. We explore the influence of the spin–orbit coupling on energies, polarization and spatial patterns of the bound (Yu–Shiba–Rusinov) states of magnetic impurities in a two-dimensional square lattice. We also address the peculiar bound states in the proximitized Rashba chain, resembling the Majorana quasiparticles, focusing on their magnetic polarization that has been recently reported by S. Jeon et al. (Science 2017, 358, 772). Finally, we study leakage of these polarized Majorana quasiparticles into side-attached nanoscopic regions and confront them with the subgap Kondo effect near to the singlet–doublet phase transition.