Journal ArticleDOI
Orbital Physics in Transition-Metal Oxides
Yoshinori Tokura,Naoto Nagaosa +1 more
Reads0
Chats0
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
More filters
Journal ArticleDOI
Growth mechanism and magnetic properties of highly crystalline NiO nanocubes and nanorods fabricated by evaporation
TL;DR: In this article, a new approach to the preparation of regularly shaped NiO nanocubes and nanorods by an infrared heating evaporation method is presented, where the growth model is proposed to be a vapor-solid mechanism.
Journal ArticleDOI
The effect of B site doping on infrared emissivity of lanthanum manganites La0.8Sr0.2Mn1−xBxO3 (B = Ti or Cu)
TL;DR: In this paper, the structure, infrared absorption, electron spin resonance (ESR) and infrared normal emissivity (ɛN) in the 8-14-μm waveband of the lanthanum manganites La0.8Sr0.2Mn1−xBxO3 were systematically investigated.
Journal ArticleDOI
Optical excitations of transition-metal oxides under the orbital multiplicity effects
TL;DR: In this article, the authors investigated optical excitations of transition-metal oxides with metal oxygen octahedra taking account of the orbital multiplicity effects, and compared the evaluated excitation energies with reported experimental data.
Journal ArticleDOI
Crystal and magnetic structure of single-crystal La1-xSrxMnO3 (x ≈ 1/8)
TL;DR: In this paper, the authors performed a NPD study on the crystal and magnetic structure of a crushed La1-xSrxMnO3 (x ≈ 1/8) single crystal.
Journal ArticleDOI
Time-dependent density-functional theory molecular-dynamics study on amorphization of Sc-Sb-Te alloy under optical excitation
Xue-Peng Wang,Xian-Bin Li,Nian-Ke Chen,Junhyeok Bang,Ryky Nelson,Christina Ertural,Richard Dronskowski,Richard Dronskowski,Hong-Bo Sun,Hong-Bo Sun,Shengbai Zhang +10 more
TL;DR: In this article, the physics underlying the optical excitation induced amorphization of Sc-Sb-Te is revealed, which goes back to superatom-like Sc-centered structural motifs.
References
More filters
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.