Orbital physics in transition-metal oxides

@article{Tokura2000OrbitalPI,
  title={Orbital physics in transition-metal oxides},
  author={Tokura and Nagaosa},
  journal={Science},
  year={2000},
  volume={288 5465},
  pages={
          462-8
        }
}
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… 

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