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

M. Frick; I. Morgenstern; W.von der Linden

doi:10.1142/S0129183192000099

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

M. Frick, I. Morgenstern, W.von der Linden

Institute of Theoretical and Computational Physics (5150)

Research output: Contribution to journal › Article › peer-review

Abstract

We study a model for high-Tc superconductors 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.

Original language	English
Pages (from-to)	105-120
Number of pages	16
Journal	International Journal of Modern Physics C
Volume	03
Issue number	01
DOIs	https://doi.org/10.1142/S0129183192000099
Publication status	Published - 1 Feb 1992

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http://www.worldscientific.com/doi/abs/10.1142/S0129183192000099

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abstract = "We study a model for high-Tc superconductors 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.",

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AB - We study a model for high-Tc superconductors 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.

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

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