Superconductivity in a unique type of copper oxide.

ABSTRACT: The mechanism of superconductivity in cuprates remains one of the big challenges of condensed matter physics. High-T _c cuprates crystallize into a layered perovskite structure featuring copper oxygen octahedral coordination. Due to the Jahn Teller effect in combination with the strong static Coulomb interaction, the octahedra in high-T _c cuprates are elongated along the c axis, leading to a 3dx ²-y ² orbital at the top of the band structure wherein the doped holes reside. This scenario gives rise to 2D characteristics in high-T _c cuprates that favor d-wave pairing symmetry. Here, we report superconductivity in a cuprate Ba₂CuO_4-y , wherei

SUBMITTER: Li WM 

PROVIDER: S-EPMC6589659 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature