Abstract
The bisoliton theory of high-temperature superconductivity of ceramic compounds is discussed on the basis of a quasi-one-dimensional model with moderately strong electron-phonon interaction. Bisolitons are described by three coupled equations that characterise the interaction between two fields of quasiparticles, having spins directed in opposite ways, with local deformation of the quasi-one-dimensional chain of alternating copper and oxygen ions. The explicit form of the wavefunction of bisoliton condensate is found. The condensate stability conditions and bisoliton generation at the metal-superconductor boundary are discussed. The question of why different gap widths are obtained in tunnelling and spectroscopic measurements is also disputed.
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