TY  - JOUR
AU  - Küster, Felix
AU  - Wagner, Glenn
AU  - Das, Souvik
AU  - Aldarawsheh, Amal
AU  - Thomale, Ronny
AU  - Lounis, Samir
AU  - Parkin, Stuart S. P.
AU  - Sessi, Paolo
AU  - Neupert, Titus
TI  - Two-dimensional Shiba lattices as a possible platform for crystalline topological superconductivity
JO  - Nature physics
VL  - 19
IS  - 12
SN  - 1745-2473
CY  - Basingstoke
PB  - Nature Publishing Group
M1  - FZJ-2023-05898
SP  - 1848 - 1854
PY  - 2023
AB  - Localized or propagating Majorana boundary modes are the key feature of topological superconductors. They are rare in naturally occurring compounds, but the tailored manipulation of quantum matter offers opportunities for their realization. Specifically, lattices of Yu–Shiba–Rusinov bound states—Shiba lattices—that arise when magnetic adatoms are placed on the surface of a conventional superconductor can be used to create topological bands within the superconducting gap of the substrate. Here we reveal two signatures consistent with the realization of two types of mirror-symmetry-protected topological superconductor using scanning tunnelling microscopy to create and probe adatom lattices with single-atom precision. The first has edge modes as well as higher-order corner states, and the second has symmetry-protected bulk nodal points. In principle, their topological character and boundary modes should be protected by the spatial symmetries of the adatom lattice. Our results highlight the potential of Shiba lattices as a platform to design the topology and sample geometry of two-dimensional superconductors.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001025581000001
DO  - DOI:10.1038/s41567-023-02104-5
UR  - https://juser.fz-juelich.de/record/1020231
ER  -