New correlated model of colossal magnetoresistive manganese oxides.

Direct Electronic Structure Measurements of the Colossal Magnetoresistive Oxides

Fermi surface nesting and nanoscale fluctuating charge/orbital ordering in colossal magnetoresistive oxides.

We used high-resolution angle-resolved photoemission spectroscopy to reveal the Fermi surface and key transport parameters of the metallic state of the layered colossal magnetoresistive oxide La1.2Sr1.8Mn2O7. With these parameters, the calculated in-plane conductivity is nearly one order of magnitude larger than the measured direct current conductivity. This discrepancy can be accounted for by ...

A Surface Insulator-to-Conductor Phase Transition in Colossal Magnetoresistive Manganese Perovskites Thin Films

We have observed a distinct surface phase transition for an important class of colossal magnetoresistive materials, La0.65D0.35MnO3 (with D = Sr, Pb) occurring in a surface layer compositionally different from the bulk. The surface phase transition occurs around 240 K compared to 350 K for the bulk and is fundamentally different. In the bulk, a ferromagnetic metal to paramagnetic ‘bad metal’ oc...

Magnetic and Transport Properties Of

After the discovery of the high-Tc superconducting oxides, many strongly correlated 3d electron systems have been reinvestigated. Recently, perovskite-type manganese oxides (R,A)MnO3 have been studied extensively. The above group of materials exhibit colossal magnetoresistance (MR) at the carrier doped region, which is interesting not only from the standpoint of strongly correlated systems but ...

DYNAMICAL PAIRING CORRELATIONS IN THE t–J MODEL WITH NON–ADIABATIC HOLE–PHONON COUPLING

The interplay of electronic and lattice degrees of freedom in strongly electron– correlated systems is now attracting a lot of attention. This interest is partially due to the prominent role of the electron–phonon (EP) interaction in several transition metal oxides with strong Coulomb correlations, such as the colossal magnetoresistive manganites or the charge–ordered (insulating) nickelates. F...