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
Theoretical Aspects of Charge Ordering in Molecular Conductors
TL;DR: Theoretical studies on charge ordering in quarter-filled molecular (organic) conductors are reviewed in this article, where anisotropic networks in not only the electron hopping but also in the inter-site Coulomb repulsion are constructed from the crystal structures, which serve for individual study on each material as well as for their systematic understandings.
Journal ArticleDOI
Interface Engineering and Emergent Phenomena in Oxide Heterostructures.
Zhen Huang,Ariando,Xiao Renshaw Wang,Andrivo Rusydi,Jingsheng Chen,Hyunsoo Yang,Thirumalai Venkatesan +6 more
TL;DR: Some recently developed strategies in engineering functional oxide interfaces and their emergent properties are reviewed and provide potentials for exploring next-generation electronic devices with high functionality.
Journal Article
Publisher's Note: Bridging Multiferroic Phase Transitions by Epitaxial Strain in BiFeO3
Ingrid C. Infante,Sergey Lisenkov,Bertrand Dupé,Manuel Bibes,Stéphane Fusil,Eric Jacquet,Grégory Geneste,Sylvain Petit,A. Courtial,Jean Juraszek,Laurent Bellaiche,A. Barthélémy,Brahim Dkhil +12 more
TL;DR: It is argued that the influence of epitaxial strain is caused by an interplay of polar and oxygen tilting instabilities and that strain can drive both transitions close together to yield increased magnetoelectric responses.
Journal ArticleDOI
High temperature thermoelectric characteristics of Ca0.9R0.1MnO3 (R=La,Pr,…,Yb)
Yang Wang,Yu Sui,Wenhui Su +2 more
TL;DR: In this article, the transport behavior for all the samples is adiabatic small polaron hopping mechanism below 600 K but changes to metallic conductivity at higher temperature Above 600 K, more 3d electrons of Mn3+ ions will occupy eg orbitals, resulting in the variation in thermoelectric power values.
Journal ArticleDOI
Orbital ordering phenomena in d- and f-electron systems
TL;DR: In this article, a detailed review of the recent advances in the understanding of orbital ordering phenomenon in Ca2RuO4 is presented, in which a simple mechanism works for the formation of complex spin, charge and orbital ordering.
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.