Pronounced interplay between intrinsic phase-coexistence and octahedral tilt magnitude in hole-doped lanthanum cuprates.

ABSTRACT: Definitive understanding of superconductivity and its interplay with structural symmetry in the hole-doped lanthanum cuprates remains elusive. The suppression of superconductivity around 1/8th doping maintains particular focus, often attributed to charge-density waves (CDWs) ordering in the low-temperature tetragonal (LTT) phase. Central to many investigations into this interplay is the thesis that La_1.875Ba_0.125CuO₄ and particularly La_1.675Eu_0.2Sr_0.125CuO₄ present model systems of purely LTT structure at low temperature. However, combining single-crystal and high-resolution powder X-ray diffraction, we find these to exhibit significant, intrinsic coexistence of LTT and low-temperature orthorhombic domains, typica

SUBMITTER: Tidey JP 

PROVIDER: S-EPMC9395519 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature