Journal ArticleDOI
Orbital Physics in Transition-Metal Oxides
Yoshinori Tokura,Naoto Nagaosa +1 more
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An overview is given here on this "orbital physics," which will be a key concept for the science and technology of correlated electrons.Abstract:
An electron in a solid, that is, bound to or nearly localized on the specific atomic site, has three attributes: charge, spin, and orbital. The orbital represents the shape of the electron cloud in solid. In transition-metal oxides with anisotropic-shaped d-orbital electrons, the Coulomb interaction between the electrons (strong electron correlation effect) is of importance for understanding their metal-insulator transitions and properties such as high-temperature superconductivity and colossal magnetoresistance. The orbital degree of freedom occasionally plays an important role in these phenomena, and its correlation and/or order-disorder transition causes a variety of phenomena through strong coupling with charge, spin, and lattice dynamics. An overview is given here on this "orbital physics," which will be a key concept for the science and technology of correlated electrons.read more
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Journal ArticleDOI
Local octahedral rotations and octahedral connectivity in epitaxially strained LaNiO3/LaGaO3 superlattices
Haoyuan Qi,M. K. Kinyanjui,Johannes Biskupek,Dorin Geiger,Eva Benckiser,H.-U. Habermeier,Bernhard Keimer,Ute Kaiser +7 more
TL;DR: In this article, an aberration-corrected high-resolution transmission electron microscopy was used to investigate the local octahedral rotations in a LaNiO3/LaGaO3 superlattice grown on a (001) SrTiO3 substrate.
Journal ArticleDOI
Percolative metal-insulator transition in LaMnO 3
TL;DR: In this paper, the Gutzwiller method was used to treat correlation effects in a model Hamiltonian that includes both Coulomb and Jahn-Teller interactions, and it was shown that the metal-insulator transition is driven by a competition between electronic correlation and the electron-lattice interaction.
Posted Content
Reconstruction of 3-D Atomic Distortions from Electron Microscopy with Deep Learning.
TL;DR: It is demonstrated that an end-to-end deep learning model can successfully recover 3-dimensional atomic distortions of a variety of oxide perovskite materials from a single 2-dimensional experimental scanning transmission electron (STEM) micrograph, in the process resolving a longstanding question in the recovery of 3-D atomic distortions from STEM experiments.
Journal ArticleDOI
Classical Monte Carlo study for antiferro quadrupole orders in a diamond lattice
TL;DR: In this article, the authors investigated antiferro quadrupole orders in a diamond lattice under magnetic fields by Monte Carlo simulations for two types of classical effective models: an XY model with Z-3 anisotropy and a two-component phi^4 model with third-order anisotropic anisosotropy.
Book ChapterDOI
Epitaxy of 5d transition metal oxide thin films and heterostructures
John Nichols,H.N. Lee +1 more
TL;DR: The epitaxy of complex-oxide thin films and heterostructures provides an immense challenge in designing novel functional oxides, enabling us to explore previously unavailable phase space regions as discussed by the authors.
References
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Journal ArticleDOI
Interaction between the d -Shells in the Transition Metals. II. Ferromagnetic Compounds of Manganese with Perovskite Structure
TL;DR: In this paper, it was shown that both electrical conduction and ferromagnetic coupling in these compounds arise from a double exchange process, and a quantitative relation was developed between electrical conductivity and the Ferromagnetic Curie temperature.
Journal ArticleDOI
Theory of the role of covalence in the perovskite-type manganites [La,M(II)]MnO3
TL;DR: In this article, the theory of double exchange was applied to perovskite-type manganites and detailed qualitative predictions about the magnetic lattice, the crystallographic lattice and the electrical resistivity were made.
Journal ArticleDOI
Stability of Polyatomic Molecules in Degenerate Electronic States. I. Orbital Degeneracy
H. A. Jahn,Edward Teller +1 more
TL;DR: In this paper, it was shown that if the total electronic state of orbital and spin motion is degenerate, then a non-linear configuration of the molecule will be unstable unless the degeneracy is the special twofold one (discussed by Kramers 1930) which can occur only when the molecule contains an odd number of electrons.
Journal ArticleDOI
Superexchange interaction and symmetry properties of electron orbitals
TL;DR: In this article, the sign of the superexchange interaction is closely connected with the symmetry of the electron orbitals and the cation orbital state when the cations are subject to the crystalline field arising from octahedral or tetrahedrally surrounding anions.