2026-05-27T14:40:52Z https://archive.materialscloud.org/oai2d
oai:materialscloud.org:2470 2025-01-30T09:30:37Z openaire_data community-mcarchive
Rüßmann, Philipp Bagchi, Mahasweta Rüßmann, Philipp Bihlmayer, Gustav Blügel, Stefan Ando, Yoichi Brede, Jens 2025-01-30 Among the family of topological superconductors derived from Bi&lt;sub&gt;2&lt;/sub&gt;Se&lt;sub&gt;3&lt;/sub&gt;, Cu&lt;sub&gt;x&lt;/sub&gt;(PbSe)&lt;sub&gt;5&lt;/sub&gt;(Bi&lt;sub&gt;2&lt;/sub&gt;Se&lt;sub&gt;3&lt;/sub&gt;)&lt;sub&gt;6&lt;/sub&gt; is unique in its surface termination of a single quintuple layer (QL) of the topological insulator (TI) Bi&lt;sub&gt;2&lt;/sub&gt;Se&lt;sub&gt;3&lt;/sub&gt; on an ordinary insulator PbSe. Here, we report a combined scanning tunneling microscopy (STM) and density functional theory (DFT) characterization of the cleaved surface of the parent compound (PbSe)&lt;sub&gt;5&lt;/sub&gt;(Bi&lt;sub&gt;2&lt;/sub&gt;Se&lt;sub&gt;3&lt;/sub&gt;)&lt;sub&gt;6&lt;/sub&gt; (PSBS). Interestingly, the potential disorder due to the random distribution of native defects is only Γ ∼ 4 meV, among the smallest reported for TIs. Performing high-resolution quasiparticle interference imaging (QPI) near the Fermi energy (E−E&lt;sub&gt;F&lt;/sub&gt; = −1 eV to 0.6 eV) we reconstruct the dispersion relation of the dominant spectral feature and our ab initio calculations show that this surface feature originates from two bands with Rashba-like splitting due to strong spin-orbit coupling and inversion symmetry breaking. Moreover, a small hexagonal distortion of the calculated Fermi surface is seen in the full momentum space distribution of the measured scattering data. Interestingly, the scattering pattern transforms into a flower-like shape with suppressed intensity along the ΓK direction, at lower energies. However, this change is not due to the forbidden backscattering in the topological surface state in Bi&lt;sub&gt;2&lt;/sub&gt;Se&lt;sub&gt;3&lt;/sub&gt; but the threefold symmetry of the scattering potential itself. This dataset contains the experimental and theoretical data of this work. text/markdown chemical/x-cif application/zip text/plain application/octet-stream application/octet-stream application/octet-stream application/octet-stream application/zip application/zip text/markdown https://doi.org/10.24435/materialscloud:3c-m2 oai:materialscloud.org:2470 mcid:2025.24 eng Materials Cloud https://doi.org/10.5281/zenodo.7576163 https://doi.org/10.5281/zenodo.7284739 https://doi.org/10.5281/zenodo.3628250 https://doi.org/10.1038/s41524-020-00482-5 https://renkulab.io/projects/new?data=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 https://archive.materialscloud.org/communities/mcarchive https://doi.org/10.24435/materialscloud:aj-bt info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode Experimental DFT QPI Quasiparticle Interference STM topological materials topological superconductor JuKKR FLEUR Quasiparticle interference on the surface of Bi<sub>2</sub>Se<sub>3</sub> terminated (PbSe)<sub>5</sub>(Bi<sub>2</sub>Se<sub>3</sub>)<sub>6</sub> info:eu-repo/semantics/other