Regensburg 2022 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 22: Poster Monday: Surface Structure, Epitaxy, Growth and Tribology
O 22.4: Poster
Montag, 5. September 2022, 18:00–20:00, P4
Epitaxial growth of gold films on elemental superconductors — •Dongfei Wang1, Katerina Vaxevani1, Jon Ortuzar1, Stefano Trivini1, Danilo Longo1, Samuel Kerschbaumer2, Maxim Ilyn2, Celia Rogero2, and José Ignacio Pascual1 — 1CIC nanoGUNE-BRTA, 20018 Donostia-San Sebastian, Spain — 2Materials Physics Center (CSIC-UPV/EHU), San Sebastian 20018, Spain
In recent years, superconductivity proximity effect was employed in the designing of topological superconductors [1]. The basic principle in designing a topological superconductor is to introduce superconductivity, spin-orbital coupling and magnetism at the same time. Unfortunately, most of the available elemental superconductors shows less spin-orbital coupling. Gold (Au) is a material famous for its relatively large spin-orbital coupling strength. By placing Au on elemental superconductors, a superconducting system with strong spin-orbital coupling is expected [2]. In our research, Au films with different thickness were grown on elemental superconductors such as V(100) and Nb(110). The films quality were examined by STM as well as XPS technique. By placing magnetic molecules FeTPP on the surface Au/Nb(110), we demonstrate the tunability of magnetic exchange interaction between the molecule and the substrate with Yu-Shiba bound states. Moreover, great Kondo signal enhancements near the pyrrole sites are observed.
References
[1] R. Lutchyn,et al., Phys. Rev. Lett. 105, 077001 (2010)
[2] A. Gupta, et al., Physical Review B 69, 104514 (2004)