Direct observation of nodeless superconductivity and phonon modes in electron-doped copper oxide Sr_1-xNd_xCuO₂.

ABSTRACT: The microscopic understanding of high-temperature superconductivity in cuprates has been hindered by the apparent complexity of crystal structures in these materials. We used scanning tunneling microscopy and spectroscopy to study the electron-doped copper oxide compound Sr_{1- x} Nd _x CuO₂, which has only bare cations separating the CuO₂ planes and thus the simplest infinite-layer structure of all cuprate superconductors. Tunneling conductance spectra of the major CuO₂ planes in the superconducting state revealed direct evidence for a nodeless pairing gap, regardless of variation of its magnitude with the local doping of trivalent neodymium. Furthermore, three distinct bosonic modes are observed as multiple peak-

SUBMITTER: Fan JQ 

PROVIDER: S-EPMC9070465 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature