Phase separation tendencies in manganites as a possible explanation of the CMR effect

  • Dagotto E
  • Yunoki S
  • Moreo A
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This paper is a brief review of the present status of the computational studies of models for manganites that recently reported the existence of phase separation at low-temperatures. Results for both the one-orbital and two-orbital models, the latter with Jahn-Teller phonons, are discussed. The spin-canted phase widely believed until recently to exist at low hole-density is not stable. The tendencies to charge clustering suggest that local mean-field approaches may not be suitable for the study of models for manganites, especially at finite temperature where the phase separation tendencies will be dynamic rather than static. A large list of experimental results are compatible with the existence of charge-inhomogeneities in the manganites, which may be an important ingredient for the explanation of the CMR effect in these compounds.

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  • E. Dagotto

  • S. Yunoki

  • A. Moreo

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