Coulomb repulsion of holes and competition between dx2−y2 -wave and s-wave parings in cuprate superconductors : научное издание

Описание

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.

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Издание

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

Авторы

  • Val’kov V.V. (Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Scientific Center,”, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation)
  • Dzebisashvili D.M. (Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Scientific Center,”, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation, Reshetnev Siberian State University of Science and Technologies, Krasnoyarsk, Russian Federation)
  • Korovushkin M.M. (Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Scientific Center,”, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, Russian Federation)
  • Barabanov A.F. (Vereshchagin Institute of High Pressure Physics, Russian Academy of Sciences, Troitsk, Moscow, Russian Federation)

Вхождение в базы данных

  • Scopus (цитирований 2)