Models for Manganites

  • Elbio Dagotto
Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 136)


In the previous chapter, an electronic model was derived for the case of several nearly degenerate orbitals in a given ion. The resulting model, which included on site Coulombic interactions (4.17, 4.18), was found to be very general, and its applicability goes beyond the manganites into ruthenates, nickelates, and other multiorbital compounds. Also, the discussion in the last chapter on the Jahn Teller effects was general as well, and suitable for a variety of materials. In this chapter, the model-writing effort will be entirely focused on manganites. This effort will not simply lead to trivial special cases of the previous results, but further work will be needed since the Hamiltonians of Chap. 4 are, unfortunately, too complicated for an accurate many-body treatment. Simpler models must be derived (or guessed!) under reasonable assumptions, to make progress on the theoretical aspects of manganese oxides. The setup of these simpler models is the main goal of the present chapter.


Localize Spin Breathing Mode Electron Phonon Coupling Jahn Teller Wannier Function 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2003

Authors and Affiliations

  • Elbio Dagotto
    • 1
  1. 1.Physics Department and National High Magnetic Field LabFlorida State UniversityTallahasseeUSA

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