Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2007-05-03
Phys. Rev. B 76, 064532 (2007)
Physics
Condensed Matter
Strongly Correlated Electrons
12 pages, 9 figures
Scientific paper
10.1103/PhysRevB.76.064532
The electron doping of undoped high-$T_c$ cuprates via the transfer of charge from manganites (or other oxides) using heterostructure geometries is here theoretically discussed. This possibility is mainly addressed via a detailed analysis of photoemission and diffusion voltage experiments, which locate the Fermi level of manganites above the bottom of the upper Hubbard band of some cuprate parent compounds. A diagram with the relative location of Fermi levels and gaps for several oxides is presented. The procedure discussed here is generic, allowing for the qualitative prediction of the charge flow direction at several oxide interfaces. The addition of electrons to antiferromagnetic Cu oxides may lead to a superconducting state at the interface with minimal quenched disorder. Model calculations using static and dynamical mean-field theory, supplemented by a Poisson equation formalism to address charge redistribution at the interface, support this view. The magnetic state of the manganites could be antiferromagnetic or ferromagnetic. The former is better to induce superconductivity than the latter, since the spin-polarized charge transfer will be detrimental to singlet superconductivity. It is concluded that in spite of the robust Hubbard gaps, the electron doping of undoped cuprates at interfaces appears possible, and its realization may open an exciting area of research in oxide heterostructures.
Dagotto Elbio
Fujimori Atsushi
Kancharla S. S.
Moreo Adriana
Okamoto Satoshi
No associations
LandOfFree
Electron Doping of Cuprates via Interfaces with Manganites does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Electron Doping of Cuprates via Interfaces with Manganites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electron Doping of Cuprates via Interfaces with Manganites will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-497463