Stability of the superconducting \({d_{{x^2} - {y^2}}}\) phase in high-Tc superconductors with respect to the intersite coulomb repulsion of holes at oxygen
- Authors: Val’kov V.V.1, Dzebisashvili D.M.1, Korovushkin M.M.1, Barabanov A.F.2
- 
							Affiliations: 
							- Kirensky Institute of Physics, Siberian Branch
- Vereshchagin Institute for High Pressure Physics
 
- Issue: Vol 103, No 6 (2016)
- Pages: 385-389
- Section: Condensed Matter
- URL: https://journals.rcsi.science/0021-3640/article/view/159152
- DOI: https://doi.org/10.1134/S0021364016060114
- ID: 159152
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Abstract
It has been shown that, because of the two-orbital character of the subsystem of holes located at oxygen sites and the spatial separation of this subsystem from that of spins at copper ions, the superconducting phase in high-Tc superconductors is stable with respect to the strong Coulomb repulsion of holes located at nearestneighbor oxygen sites if the order parameter has the \({d_{{x^2} - {y^2}}}\) symmetry. This effect is due to the symmetry characteristics of the Coulomb potential, owing to which the equation determining the Cooper pairing in the \({d_{{x^2} - {y^2}}}\) channel does not include this potential.
About the authors
V. V. Val’kov
Kirensky Institute of Physics, Siberian Branch
							Author for correspondence.
							Email: vvv@iph.krasn.ru
				                					                																			                												                	Russian Federation, 							Krasnoyarsk, 660036						
D. M. Dzebisashvili
Kirensky Institute of Physics, Siberian Branch
														Email: vvv@iph.krasn.ru
				                					                																			                												                	Russian Federation, 							Krasnoyarsk, 660036						
M. M. Korovushkin
Kirensky Institute of Physics, Siberian Branch
														Email: vvv@iph.krasn.ru
				                					                																			                												                	Russian Federation, 							Krasnoyarsk, 660036						
A. F. Barabanov
Vereshchagin Institute for High Pressure Physics
														Email: vvv@iph.krasn.ru
				                					                																			                												                	Russian Federation, 							Moscow, 142190						
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