ISBN 9783843950336

978-3-8439-5033-6, Reihe Physik

Lucas Schneider
Realizing topological boundary modes in bottom-up constructed magnetic nanostructures on superconducting surfaces

295 Seiten, Dissertation Universität Hamburg (2021), Softcover, A5

Zusammenfassung / Abstract

The interplay of magnetism and superconductivity leads to a rich variety of physical phenomena, ranging from a local suppression of the superconducting order parameter by magnetic impurities to potential mechanisms enabling the emergence of unconventional and high-temperature superconductivity. In this thesis, artificially crafted arrays of magnetic adatoms on different atomically clean superconducting surfaces are studied by low-temperature scanning tunneling microscopy (STM). It is shown how topologically non-trivial bands in linear magnetic chains can be investigated and even tailored in a bottom-up approach. Furthermore, a technique for high-contrast mapping of magnetic textures on the atomic scale is introduced using superconducting STM tips functionalized with magnetic atoms. These results represent a major advance in the control as well as the characterization of magnet-superconductor hybrid structures.