Abstract
Solutions of the equation for the superconducting gap including superexchange, spin–fluctuation, plasmon, and phonon pairing mechanisms are obtained. Solutions of the Bardeen–Cooper–Schrieffer equation are approximated by the expression Δk = Δ0(B cos(2ϕ) + (1 − B)cos(6ϕ) at a carrier concentration close to optimal. It is found that the dependence proportional to cos(6ϕ) is due to the spin–fluctuation and phononmediated interactions.
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Original Russian Text © M.V. Eremin, M.A. Malakhov, 2017, published in Pis’ma v Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2017, Vol. 105, No. 11, pp. 680–684.
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Eremin, M.V., Malakhov, M.A. On the superconducting gap dispersion in hole-doped cuprates. Jetp Lett. 105, 710–714 (2017). https://doi.org/10.1134/S0021364017110066
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DOI: https://doi.org/10.1134/S0021364017110066