Local-structure insight into the improved superconducting properties of Pb-substituted La(O, F)BiS₂: a photoelectron holography study.

ABSTRACT: Pb-substituted La(O, F)BiS₂ (Pb-LaOFBiS₂) exhibits improved superconducting properties and a resistivity anomaly around 100 K that is attributed to a structural transition. We have performed temperature(T)-dependent photoelectron holography (PEH) to study dopant incorporation sites and the local structure change across the anomaly. The PEH study of Pb-LaOFBiS₂ provided evidence for the dominant incorporation sites of Pb and F: Pb atoms are incorporated into the Bi sites and F atoms are incorporated into the O site. No remarkable difference in the local structures around Pb and Bi atoms was observed. Across the temperature of the resistivity anomaly (T^*), photoelectron holograms of Bi 4f changed. Comparisons of holograms with those of non-substitu

SUBMITTER: Li Y 

PROVIDER: S-EPMC11897217 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature