The normal-state transport properties of the La1.85-xSr0.15+xCu1-xMnxO4 system have been investigated by means of resistivity and thermoelectric power. The experimental results indicate that Mn doping induces a strong lattice deformation and leads to a gradual localization of the holes. The temperature-dependent resistivity and the broad peak in the S-T curve as well as the shift of the peak are discussed in terms of the change of crystal structure and d-p hybridization state.
The incommensurate modulation structure and electronic structure of the system were investigated by means of Raman scattering, transmission electron microscopy and x-ray photoemission. Analyses of Raman spectra and electron diffraction reveal that, even though the extra oxygen behaviours in layers for the three samples are very different, they possess a similar monoclinic modulation characteristic with modulation wavelength , which supports the crystal misfit model. Analysis of XPS results indicates that extra oxygen intercalation has a strong influence on the electronic structure; a possible Bi 6s contribution to the valence band is suggested.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.