Spectroscopic evidence of superconductivity pairing at 83 K in single-layer FeSe/SrTiO₃ films.

ABSTRACT: Single-layer FeSe films grown on the SrTiO₃ substrate (FeSe/STO) have attracted much attention because of their possible record-high superconducting critical temperature (T_c) and distinct electronic structures. However, it has been under debate on how high its T_c can really reach due to the inconsistency of the results from different measurements. Here we report spectroscopic evidence of superconductivity pairing at 83 K in single-layer FeSe/STO films. By preparing high-quality single-layer FeSe/STO films, we observe strong superconductivity-induced Bogoliubov back-bending bands that extend to rather high binding energy ~ 100 meV by high-resolution angle-resolved photoemission measurements. They provide a new definitive benchmark of superconductivity pairin

SUBMITTER: Xu Y 

PROVIDER: S-EPMC8121788 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature