Electronic structure of nickelates: From two-dimensional heterostructures to three-dimensional bulk materials
Hansmann P, Toschi A, Yang X, Andersen OK, Held K (2010)
Publication Type: Journal article
Publication year: 2010
Journal
Book Volume: 82
Journal Issue: 23
DOI: 10.1103/PhysRevB.82.235123
Abstract
Reduced dimensionality and strong electronic correlations, which are among the most important ingredients for cupratelike high-T-c superconductivity, characterize also the physics of nickelate-based heterostructures. Starting from the local-density approximation we arrive at a simple two-band model for quasi-two-dimensional (2D) LaNiO3/LaAlO3 heterostructures and extend it by introducing an appropriate hopping in the z direction to describe the dimensional crossover to three dimensions (3D). Using dynamical mean-field theory, we study the effects of electronic correlations with increasing interaction strength along the crossover from 2D to 3D. Qualitatively, the effects of electronic correlations are surprisingly similar, albeit quantitatively larger interaction strengths are required in three dimensions for getting a Mott-Hubbard insulating state. The exchange parameters of an effective Kugel-Khomskii-type spin-orbital model are also derived and reveal strong antiferromagnetic tendencies.
Authors with CRIS profile
Involved external institutions
Technische Universität Wien / Vienna University of Technology
Austria (AT)
Max-Planck-Institut für Festkörperforschung
Germany (DE)
Austria (AT)
Max-Planck-Institut für Festkörperforschung
Germany (DE)
How to cite
APA:
Hansmann, P., Toschi, A., Yang, X., Andersen, O.K., & Held, K. (2010). Electronic structure of nickelates: From two-dimensional heterostructures to three-dimensional bulk materials. Physical Review B, 82(23). https://doi.org/10.1103/PhysRevB.82.235123
MLA:
Hansmann, Philipp, et al. "Electronic structure of nickelates: From two-dimensional heterostructures to three-dimensional bulk materials." Physical Review B 82.23 (2010).
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