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Orbital Physics in Transition-Metal Oxides
Yoshinori Tokura,Naoto Nagaosa +1 more
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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
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Melting of magnetic correlations in charge-orbital ordered La 1 / 2 Sr 3 / 2 MnO 4 : Competition of ferromagnetic and antiferromagnetic states
D. Senff,O. Schumann,M. Benomar,Markus Kriener,Markus Kriener,Thomas Lorenz,Yvan Sidis,K. Habicht,P. Link,Markus Braden +9 more
TL;DR: In this article, the magnetic correlations in the charge and orbital ordered manganite have been studied by elastic and inelastic neutron scattering techniques, and a competition between CE-type and ferromagnetic fluctuations develops.
Journal ArticleDOI
The novel electronic and magnetic properties in 5d transition metal oxides system
Yongping Du,Xiangang Wan +1 more
TL;DR: In this article, the Weyl-Semimetal in pyrochlore iridates, the Axion insulator in spinel osmates, the Slater insulator, and the anisotropic unscreened Coulomb interaction in ferroelectric metal LiOsO3 are discussed.
Journal ArticleDOI
Atomically Resolved Electronic States and Correlated Magnetic Order at Termination Engineered Complex Oxide Heterointerfaces.
Bo Chao Huang,Bo Chao Huang,Pu Yu,Ying-Hao Chu,Ying-Hao Chu,Chia-Seng Chang,Ramamoorthy Ramesh,Rafal E. Dunin-Borkowski,Philipp Ebert,Ya Ping Chiu,Ya Ping Chiu +10 more
TL;DR: A delicate interplay of different correlated physical effects is identified and related to the ferroelectric and magnetic interface properties tuned by engineering the atomic layer stacking sequence at the interfaces.
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Strain tuning of plasma frequency in vanadate, niobate, and molybdate perovskite oxides
Arpita Paul,Turan Birol +1 more
TL;DR: In this paper, the behavior of the electronic properties of early transition metal oxides under strain, using first-principles density-functional theory and dynamical mean-field theory, is investigated.
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Interface controlled electronic charge inhomogeneities in correlated heterostructures.
Natalia Pavlenko,Thilo Kopp +1 more
TL;DR: It is found that electronic ordering in the film is associated with a strongly inhomogeneous polaron effect and it is proposed to consider the interfacial tuning as a powerful mechanism to control the charge ordering in correlated electronic systems.
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.
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.
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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.