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Room-temperature electronic phase transitions in the continuous phase diagrams of perovskite manganites

Author

Listed:
  • Young-Kook Yoo

    (Lawrence Berkeley National Laboratory
    University of California at Berkeley)

  • Fred Duewer

    (Lawrence Berkeley National Laboratory
    University of California at Berkeley)

  • Haitao Yang

    (Lawrence Berkeley National Laboratory)

  • Dong Yi

    (Lawrence Berkeley National Laboratory)

  • Jing-Wei Li

    (Lawrence Berkeley National Laboratory)

  • X.-D. Xiang

    (Lawrence Berkeley National Laboratory)

Abstract

Highly correlated electronic systems—such as transition-metal oxides that are doped Mott insulators—are complex systems which exhibit puzzling phenomena, including high-temperature superconductivity and colossal magnetoresistivity. Recent studies1,2,3 suggest that in such systems collective electronic phenomena are important, arising from long-range Coulomb interactions and magnetic effects. The qualitative behaviour of these systems is strongly dependent on charge filling (the level of doping) and the lattice constant. Here we report a time-efficient and systematic experimental approach for studying the phase diagrams of condensed-matter systems. It involves the continuous mapping of the physical properties of epitaxial thin films of perovskite manganites (a class of doped Mott insulator) as their composition is varied. We discover evidence that suggests the presence of phase boundaries of electronic origin at room temperature.

Suggested Citation

  • Young-Kook Yoo & Fred Duewer & Haitao Yang & Dong Yi & Jing-Wei Li & X.-D. Xiang, 2000. "Room-temperature electronic phase transitions in the continuous phase diagrams of perovskite manganites," Nature, Nature, vol. 406(6797), pages 704-708, August.
    • Handle: RePEc:nat:nature:v:406:y:2000:i:6797:d:10.1038_35021018
    DOI: 10.1038/35021018
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