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
Physics of higher orbital bands in optical lattices: a review
TL;DR: A brief introduction of orbital degrees of freedom in optical lattices is given and a summary of exotic orbital models and resulting many-body phases is provided.
Journal ArticleDOI
Atomic-Scale Visualization of Initial Growth of Homoepitaxial SrTiO3 Thin Film on an Atomically Ordered Substrate
Ryota Shimizu,Ryota Shimizu,Katsuya Iwaya,Takeo Ohsawa,Susumu Shiraki,Tetsuya Hasegawa,Tomihiro Hashizume,Tomihiro Hashizume,Tomihiro Hashizume,Taro Hitosugi,Taro Hitosugi +10 more
TL;DR: In this article, the initial homoepitaxial growth of SrTiO3 on a (√13 × √13)-R33.7° substrate surface, which can be prepared under oxide growth conditions, is atomically resolved by scanning tunneling microscopy.
Journal ArticleDOI
Latent instabilities in metallic LaNiO3 films by strain control of Fermi-surface topology.
Hyang Keun Yoo,Seung Hyun,Luca Moreschini,Hyeong-Do Kim,Young Jun Chang,Changhee Sohn,Da Woon Jeong,Soobin Sinn,Yong Su Kim,Aaron Bostwick,Eli Rotenberg,Ji Hoon Shim,Tae Won Noh +12 more
TL;DR: This work investigates the strain-induced changes of electronic structures in strongly correlated LaNiO3 (LNO) films, using angle-resolved photoemission spectroscopy and the dynamical mean-field theory to search for new emergent phenomena in transition-metal-oxide films.
Journal ArticleDOI
Spin-glass-like behavior in rhombohedral Li(Mn,Cr)O2
TL;DR: In this paper, the magnetic properties of Cr-doped rhombohedral LiMnO2 are investigated and two paramagnetic regions are separated at 95K with a reduction in the effective moment due to the change in spin-orbit coupling.
Journal ArticleDOI
Effect of top electrode on resistance switching of (Pr, Ca)MnO3 thin films
Chang Jung Kim,I-Wei Chen +1 more
TL;DR: In this article, the relationship between top electrode materials and Pr 1 −x Ca x MnO 3 (PCMO) thin films on the electric field driven resistance switching property was investigated, and it was found that the resistance of the electrode/PCMO film is dominated by interface resistance, and switching is an interfacial phenomenon with characteristic nonlinear current-voltage responses under both static and dynamic conditions.
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.