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
Dimensionality control of d-orbital occupation in oxide superlattices.
Da Woon Jeong,Woo Seok Choi,Satoshi Okamoto,Jae Young Kim,Kyung Wan Kim,S. J. Moon,Deok-Yong Cho,Ho Nyung Lee,Tae Won Noh +8 more
TL;DR: The remarkable orbital controllability shown here offers a promising pathway for novel applications such as catalysis and photovoltaics, where the energy of d level is an essential parameter.
Journal ArticleDOI
Strain-Driven Orbital and Magnetic Orders and Phase Separation in Epitaxial Half-Doped Manganite Films for Tunneling Devices
David Pesquera,Alessandro Barla,Marek Wojcik,E. Jedryka,Federica Bondino,Elena Magnano,Silvia Nappini,Diego Gutiérrez,Greta Radaelli,Greta Radaelli,Gervasi Herranz,Florencio Sánchez,Josep Fontcuberta +12 more
TL;DR: In this paper, the authors used NMR to study orbital and magnetic orderings in epitaxial films, and evaluated how the films evolve with strain and electronic bandwidth. But their results are key to engineering large tunneling electroresistance in FTJ.
Journal ArticleDOI
Dimensional crossover and charge order in half-doped manganites and cobaltites.
TL;DR: A generic model for understanding the effect of quenched disorder on charge-ordering in half-doped manganese and cobalt oxides with different crystal structures is proposed.
Journal ArticleDOI
Structural and metal-insulator transitions in rhenium-based double perovskites via orbital ordering
TL;DR: In this paper, the ground-state electronic and structural properties for a family of Re-based double perovskites (DPs) have been systematically studied, which are related by a common low energy Hamiltonian, using density functional theory +$U$ calculations.
Journal ArticleDOI
Effect of A-site cation disorder on charge ordering and ferromagnetism of La0.5Ca0.5−yBayMnO3
Vera N. Smolyaninova,Vera N. Smolyaninova,Samuel E. Lofland,Samuel E. Lofland,C. P. Hill,R. C. Budhani,R. C. Budhani,Z. Serpil Gönen,Bryan W. Eichhorn,R. L. Greene +9 more
TL;DR: In this paper, the influence of an increase of average cation radius and cation size disorder on transport and magnetic properties of half-filled La 0.5 Ca 0.1.5−y Ba y MnO 3 was studied.
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.