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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
Citations
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Selective population of a large-angular-momentum state in an optical lattice
TL;DR: In this article, a method to selectively populate a large angularmomentum state of ultracold atoms (each with an orbital angular momentum $l\ensuremath{\approx}2\enuremath{hbar}$) in the Mott regime of a two-dimensional optical lattice is proposed.
Journal ArticleDOI
Orbital ordering and orbital fluctuations in transition metal oxides
TL;DR: In this paper, the frustrated magnetic interactions in spin-orbital models for cubic transition metal oxides with orbital degeneracy were analyzed. But the results were limited to the case of the t 2g case.
Journal ArticleDOI
Competing magnetostructural phases in a semiclassical system
Kenneth R. O'Neal,Jun Hee Lee,Maengsuk Kim,Jamie L. Manson,Zhenxian Liu,Randy Scott Fishman,Janice L. Musfeldt +6 more
TL;DR: In this paper, the authors brought together high pressure Raman scattering, modeling, and first principles calculations to reveal the pressure-temperature-magnetic field phase diagram of Mn[N(CN)2]2.
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Cs3(O3)2(O2)·NH3: the First Mixed Alkali Metal Ozonide Superoxide
Hanne Nuss,Martin Jansen +1 more
TL;DR: The first example of a mixed alkali metal ozonide superoxide is Cs3(O3)2(O2)·NH3 as mentioned in this paper, which was prepared by the reaction of CsO3 and CSO2, in the presence of traces of NH4Cl, in liquid ammonia.
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.
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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.
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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.