Coulomb repulsion of holes and competition between \({d_{{x^2} - {y^2}}}\) -wave and s-wave parings in cuprate superconductors
- 作者: Val’kov V.V.1, Dzebisashvili D.M.1,2, Korovushkin M.M.1, Barabanov A.F.3
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隶属关系:
- Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Scientific Center,”
- Reshetnev Siberian State University of Science and Technologies
- Vereshchagin Institute of High Pressure Physics
- 期: 卷 125, 编号 5 (2017)
- 页面: 810-821
- 栏目: Order, Disorder, and Phase Transition in Condensed System
- URL: https://journals.rcsi.science/1063-7761/article/view/191389
- DOI: https://doi.org/10.1134/S1063776117110085
- ID: 191389
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详细
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 the 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.
作者简介
V. Val’kov
Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Scientific Center,”
编辑信件的主要联系方式.
Email: vvv@iph.krasn.ru
俄罗斯联邦, Krasnoyarsk, 660036
D. Dzebisashvili
Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Scientific Center,”; Reshetnev Siberian State University of Science and Technologies
Email: vvv@iph.krasn.ru
俄罗斯联邦, Krasnoyarsk, 660036; Krasnoyarsk, 660037
M. Korovushkin
Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Scientific Center,”
Email: vvv@iph.krasn.ru
俄罗斯联邦, Krasnoyarsk, 660036
A. Barabanov
Vereshchagin Institute of High Pressure Physics
Email: vvv@iph.krasn.ru
俄罗斯联邦, Troitsk, Moscow, 108840
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