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OFF-DIAGONAL LONG RANGE ORDER IN AN ELECTRON-PHONON MODEL FOR HIGH-TcSUPERCONDUCTORS

Author

Listed:
  • M. Frick

    (Institute for Theoretical Physics, University of Groningen, PO-Box 800, 9700 AV Groningen, The Netherlands;
    HLRZ c/o KfA Jülich. PO-Box 1913 5170 Jülich, Germany)

  • I. Morgenstern

    (Institute for Theoretical Physics, University of Regensburg, 8400 Regensburg, Germany)

  • W.von der Linden

    (Max-Planck Institute for Plasma Physics, Boltzmannstr.2, 8046 Garching, Germany)

Abstract

We study a model for high-Tcsuperconductors describing both the strong electronic correlations and a coupling of the carriers to anharmonic phonons. The Projector Quantum Monte Carlo Scheme has been employed to investigate ground state properties. We analyze the superconducting properties of the model by directly addressing to the existence of Off-Diagonal Long Range Order (ODLRO). We review the numerical algorithm and discuss the possibility to observe ODLRO. In the presented model, we find ODLRO pointing towards superconductivity instead of the presence of strong electronic correlations. We discuss several features of the superconducting condensate.

Suggested Citation

  • M. Frick & I. Morgenstern & W.von der Linden, 1992. "OFF-DIAGONAL LONG RANGE ORDER IN AN ELECTRON-PHONON MODEL FOR HIGH-TcSUPERCONDUCTORS," International Journal of Modern Physics C (IJMPC), World Scientific Publishing Co. Pte. Ltd., vol. 3(01), pages 105-120.
    • Handle: RePEc:wsi:ijmpcx:v:03:y:1992:i:01:n:s0129183192000099
    DOI: 10.1142/S0129183192000099
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