Strain control of oxygen kinetics in the Ruddlesden-Popper oxide La_1.85Sr_0.15CuO₄.

ABSTRACT: Oxygen defect control has long been considered an important route to functionalizing complex oxide films. However, the nature of oxygen defects in thin films is often not investigated beyond basic redox chemistry. One of the model examples for oxygen-defect studies is the layered Ruddlesden-Popper phase La_2-xSr _x CuO_4-δ (LSCO), in which the superconducting transition temperature is highly sensitive to epitaxial strain. However, previous observations of strain-superconductivity coupling in LSCO thin films were mainly understood in terms of elastic contributions to mechanical buckling, with minimal consideration of kinetic or thermodynamic factors. Here, we report that the oxygen nonstoichiometry commonly reported for strained cuprates is mediated by the stra

SUBMITTER: Meyer TL 

PROVIDER: S-EPMC5758782 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature