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Cooper pairing and superfluidity in the Emery model

  • Condensed Matter
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Abstract

The energy E of the system as a function of the gauge phase Φ is calculated by exact diagonalization in a two-dimensional Cu4O8 cluster and by the slave-boson method for large systems. It is shown that motion of carriers with charge 2e, i.e., Cooper pairs, is observed for certain values of the parameters in the Hamiltonian. This motion is identified from the onset of a characteristic maximum of E(Φ) at Φ≈Φ0/2, where Φ0 is the flux quantum. The phase diagram is constructed and the range of values of the model parameters where the effect is observed is determined.

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Authors and Affiliations

  1. Moscow State Engineering Physics Institute (Technical University), 115409, Moscow, Russia

    V. A. Kashurnikov & E. G. Kholmovskii

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  1. V. A. Kashurnikov
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  2. E. G. Kholmovskii
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Pis’ma Zh. Éksp. Teor. Fiz. 63, No. 2, 78–82 (25 January 1996)

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Kashurnikov, V.A., Kholmovskii, E.G. Cooper pairing and superfluidity in the Emery model. Jetp Lett. 63, 89–93 (1996). https://doi.org/10.1134/1.566984

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  • DOI: https://doi.org/10.1134/1.566984

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