Journal of Superconductivity

, Volume 10, Issue 4, pp 323–327 | Cite as

Nonuniform metallic state in manganites and cuprates

  • T. Egami
  • Despina Louca
  • R. J. McQueeney
Article
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Abstract

Local lattice distortions suggesting nonuniform charge distributions were found to be a common feature of manganites and cuprates in the metallic state by neutron scattering studies. The atomic pair-density function (PDF) determined by pulsed neutron powder diffraction showed that in La1-xSrxMnO3 doped holes form lattice polarons which persist even in the metallic state. In La1.85Sr0.15CuO4 the energy width of the LO phonons around (π,0) determined by inelastic neutron scattering reflects magnetic satellites indicative of spin charge stripe formation. The implications of such nonuniform charge distribution for metal-insulator transition and superconductivity are discussed.

Key Words

Manganites cuprates charge distribution 
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Copyright information

© Plenum Publishing Corporation 1997

Authors and Affiliations

  • T. Egami
    • 1
  • Despina Louca
    • 1
  • R. J. McQueeney
    • 2
  1. 1.Department of Materials Science and Engineering and Laboratory for Research on the Structure of MatterUniversity of PennsylvaniaPhiladelphia
  2. 2.Department of Physics and Laboratory for Research on the Structure of MatterUniversity of PennsylvaniaPhiladelphia

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