139La NMR and NQR study of the temperature dependent structure of La2CuO4+δ
Published Web Locationhttps://doi.org/10.1016/0921-4534(91)91771-U
NMR and NQR reveal substantial structural changes in the metallic phase of La2CuO4+δ which occur below 220 K. The oxygen octahedra in the metallic phase are not tilted at phase separation; upon cooling to 40 K considerable tilt has developed. The low temperature structure is highly disordered. © 1991.