Abstract
A theory of a strong-coupling large-radius bipolaron has been developed. The possibility of the formation of 3D bipolarons in high-temperature superconductors is discussed. For the bipolaron energy, the lowest variational estimate has been obtained at α > 8, where α is the electron-phonon coupling constant. The critical ionic-bond parameter η c = ɛ∞/ɛ0, where ɛ∞ and ɛ0 are the high-frequency and static dielectric constants, has been found to be η c = 0.2496.
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Original Russian Text © V.D. Lakhno, 2010, published in Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2010, Vol. 137, No. 5, pp. 926–931.
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Lakhno, V.D. Energy and critical ionic-bond parameter of a 3D large-radius bipolaron. J. Exp. Theor. Phys. 110, 811–815 (2010). https://doi.org/10.1134/S1063776110050122
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DOI: https://doi.org/10.1134/S1063776110050122