Тип публикации: статья из журнала
Год издания: 2017
Идентификатор DOI: 10.1134/S1063776117110085
Аннотация: The effect of the Coulomb repulsion of holes on the Cooper instability in an ensemble of spin–polaron quasiparticles has been analyzed, taking into account the peculiarities of the crystallographic structure of the CuO2 plane, which are associated with the presence of two oxygen ions and one copper ion in the unit cell, as well as Показать полностьюthe strong spin–fermion coupling. The investigation of the possibility of implementation of superconducting phases with d-wave and s-wave of the order parameter symmetry has shown that in the entire doping region only the d-wave pairing satisfies the self-consistency equations, while there is no solution for the s-wave pairing. This result completely corresponds to the experimental data on cuprate HTSC. It has been demonstrated analytically that the intersite Coulomb interaction does not affect the superconducting d-wave pairing, because its Fourier transform Vq does not appear in the kernel of the corresponding integral equation. © 2017, Pleiades Publishing, Inc.
Журнал: Journal of Experimental and Theoretical Physics
Выпуск журнала: Vol. 125, Is. 5
Номера страниц: 810-821
ISSN журнала: 10637761
Издатель: Maik Nauka-Interperiodica Publishing