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Multiband Responses in High-T c Cuprate Superconductors

  • G. Nikšić
  • I. Kupčić
  • O. S. Barišić
  • D. K. SunkoEmail author
  • S. Barišić
Original Paper

Abstract

We report on the interplay of localized and extended degrees of freedom in the metallic state of high-temperature superconductors in a multiband setting. Various ways in which the bare magnetic response may become incommensurate are measured against both phenomenological and theoretical requirements. In particular, the pseudogap temperature is typically much higher than the incommensurability temperature. When microscopic strong-coupling effects with real-time dynamics between copper and oxygen sites are included, they tend to restore commensurability. Quantum transport equations for low-dimensional multiband electronic systems are used to explain the linear doping dependence of the dc conductivity and the doping and temperature dependence of the Hall number in the underdoped LSCO compounds. Coulomb effects of dopands are inferred from the doping evolution of the Hartree–Fock model parameters.

Keywords

Emery model Magnetic fluctuations Electron-doped superconductors 

Notes

Acknowledgements

Conversations with J. Tranquada and source files of published data provided by A. Fujimori are gratefully acknowledged. This work was supported by the Croatian Government under Project No. 119–1191458–0512.

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • G. Nikšić
    • 1
  • I. Kupčić
    • 1
  • O. S. Barišić
    • 2
  • D. K. Sunko
    • 1
    Email author
  • S. Barišić
    • 1
  1. 1.Department of Physics, Faculty of ScienceUniversity of ZagrebZagrebCroatia
  2. 2.Institute of PhysicsZagrebCroatia

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