Dominance of many-body effects over one-electron mechanism for band structure doping dependence in Nd$_{2-x}$Ce$_x$CuO$_4$: LDA+GTB approach

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dc.creatorKorshunov, M. M.
dc.creatorGavrichkov, V. A.
dc.creatorOvchinnikov, S. G.
dc.creatorNekrasov, I. A.
dc.creatorKokorina, E. E.
dc.creatorPchelkina, Z. V.
dc.date2007-05-07
dc.date2007-11-13
dc.date.accessioned2026-07-07T08:42:09Z
dc.date.available2026-07-07T08:42:09Z
dc.descriptionIn the present work we report the band structure calculations for the high temperature superconductor Nd$_{2-x}$Ce$_x$CuO$_4$ in the regime of strong electronic correlations within an LDA+GTB method, which combines the local density approximation (LDA) and the generalized tight-binding method (GTB). The two mechanisms of band structure doping dependence were taken into account. Namely, the one-electron mechanism provided by the doping dependence of the crystal structure, and the many-body mechanism provided by the strong renormalization of the fermionic quasiparticles due to the large on-site Coulomb repulsion. We have shown that in the antiferromagnetic and in the strongly correlated paramagnetic phases of the underdoped cuprates the main contribution to the doping evolution of band structure and Fermi surface comes from the many-body mechanism.
dc.description15 pages, 4 figures, new references and their discussion added, figures updated
dc.identifierhttps://arxiv.org/abs/0705.0939
dc.identifierhttp://arxiv.org/abs/0705.0939
dc.identifierJ. Phys.: Condens. Matter 19, 486203 (2007)
dc.identifierdoi:10.1088/0953-8984/19/48/486203
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/141866
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleDominance of many-body effects over one-electron mechanism for band structure doping dependence in Nd$_{2-x}$Ce$_x$CuO$_4$: LDA+GTB approach
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