Renormalization of the quasiparticle hopping integrals by spin interactions in layered copper oxides

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dc.creatorHozoi, L.
dc.creatorNishimoto, S.
dc.creatorde Graaf, C.
dc.date2006-11-28
dc.date.accessioned2026-07-07T08:00:06Z
dc.date.available2026-07-07T08:00:06Z
dc.descriptionHoles doped within the square CuO2 network specific to the cuprate superconducting materials have oxygen 2p character. We investigate the basic properties of such oxygen holes by wavefunction-based quantum chemical calculations on large embedded clusters. We find that a 2p hole induces ferromagnetic correlations among the nearest-neighbor Cu 3d spins. When moving through the antiferromagnetic background the hole must bring along this spin polarization cloud at nearby Cu sites, which gives rise to a substantial reduction of the effective hopping parameters. Such interactions can explain the relatively low values inferred for the effective hoppings by fitting the angle-resolved photoemission data. The effect of the background antiferromagnetic couplings of renormalizing the effective nearest-neighbor hopping is also confirmed by density-matrix renormalization-group model Hamiltonian calculations for chains and ladders of CuO4 plaquettes.
dc.identifierhttps://arxiv.org/abs/cond-mat/0611720
dc.identifierhttp://arxiv.org/abs/cond-mat/0611720
dc.identifierPhys. Rev. B 75, 174505 (2007)
dc.identifierdoi:10.1103/PhysRevB.75.174505
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/128599
dc.subjectStrongly Correlated Electrons
dc.titleRenormalization of the quasiparticle hopping integrals by spin interactions in layered copper oxides
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