Dresden 2026 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 93: Superconductivity – Poster II
TT 93.15: Poster
Donnerstag, 12. März 2026, 18:00–20:00, P4
Atomic-scale visualization of the superconducting order parameter in the misfit compound (SnS)1.17NbS2 — Dongming Zhao1, •Shamarita Deb1, 2, Dmytro S. Inosov2, Claudia Felser1, Sushmita Chandra1, and Jian-Feng Ge1 — 1Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany — 2Technical University of Dresden, 01062 Dresden, Germany
Misfit compounds are naturally stacked heterostructures, composed of layers with distinct sublattices. Owing to the incommensurate structural modulations and interlayer coupling, they can exhibit exotic phenomena such as Ising superconductivity and charge density waves. Here, we investigate the high-quality misfit superconductor (SnS)1.17NbS2, a non-centrosymmetric superconductor composed of alternating Sn2 and NbS2 layers. Utilising scanning tunnelling microscopy, we obtained atomic-resolution images that clearly resolve, for the first time, both the square lattice on the SnS layer and the hexagonal lattice on the NbS2 layer. Scanning tunnelling spectroscopy measurements further reveal well-defined superconducting gaps on both layers. Our ongoing experiments aim to visualise its superconducting order parameter with atomic resolution and to explore possible unconventional pairing mechanisms enabled by the intrinsic structural modulations.
Keywords: misfit layered superconductor; incommensurate structure; scanning tunneling microscopy; unconventional pairing