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Orbital Physics in Transition-Metal Oxides
Yoshinori Tokura,Naoto Nagaosa +1 more
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TLDR
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
Citations
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Journal ArticleDOI
Catalytically Influential Features in Transition Metal Oxides
Journal ArticleDOI
Electronic structure of highly ordered Sr2FeMoO6: XPS and XES studies
Karsten Kuepper,M. Kadiroglu,Andrei Postnikov,Andrei Postnikov,Kevin C. Prince,M. Matteucci,V. R. Galakhov,H. Hesse,G. Borstel,Martin Neumann +9 more
TL;DR: In this paper, the partial densities of states of Sr2FeMoO6 were investigated by applying soft x-ray emission spectroscopy (XES) to the Fe?L, the Mo?M and the O?K edges.
Journal Article
Magnetism at the interface between ferromagnetic and superconducting oxides.
TL;DR: In this paper, the authors examined superlattices composed of the half-metallic ferromagnet La2/3Ca1/3MnO3 and the high-temperature superconductor YBa2Cu3O7 by absorption spectroscopy with circularly polarized X-rays and by off-specular neutron reflectometry.
Journal ArticleDOI
Sequential localization of a complex electron fluid.
V. Martelli,Ang Cai,Emilian M. Nica,Mathieu Taupin,Andrey Prokofiev,Chia-Chuan Liu,Hsin-Hua Lai,Rong Yu,Rong Yu,Kevin Ingersent,R. Küchler,André M. Strydom,Diana Geiger,Jonathan Haenel,J. Larrea,Qimiao Si,Silke Paschen,Silke Paschen +17 more
TL;DR: In this paper, a cubic heavy fermion metal governed by spins and orbitals is chosen as a model system for this physics and its properties are found to originate from surprisingly simple low-energy behavior, with two distinct localization transitions driven by a single degree of freedom at a time.
Journal ArticleDOI
Orbital domain dynamics in a doped manganite.
Joshua J. Turner,Joshua J. Turner,K. J. Thomas,John Hill,M. A. Pfeifer,M. A. Pfeifer,M. A. Pfeifer,Karine Chesnel,Yasuhide Tomioka,Yasuhiro Tokura,Yasuhiro Tokura,S. D. Kevan +11 more
TL;DR: In this article, the authors explore a number of novel effects near the orbital-order phase transition in a half-doped manganite, Pr0.5Ca 0.5MnO3.
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.
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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.