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P. Hansmann, X. Yang, A. Toschi, G. Khaliullin, O. K. Andersen, K. Held:
"Turning a Nickelate Fermi Surface into a Cupratelike One through Heterostructuring";
Physical Review Letters, 103 (2009), S. 016401-1 - 016401-4.

Using the local density approximation and its combination with dynamical mean-field theory, we show that electronic correlations induce a single-sheet, cupratelike Fermi surface for hole-doped 1/1 LaNiO3/LaAlO3 heterostructures, even though both eg orbitals contribute to it. The Ni 3d3z2-1 orbital plays the role of the axial Cu 4s-like orbital in the cuprates. These two results indicate that "orbital engineering" by means of heterostructuring should be possible. As we also find strong antiferromagnetic correlations, the low-energy electronic and spin excitations in nickelate heterostructures resemble those of high-temperature cuprate superconductors.

http://dx.doi.org/10.1103/PhysRevLett.103.016401

http://link.aps.org/doi/10.1103/PhysRevLett.103.016401