Insights from ARPES for an undoped, four-layered, two-gap high-T_c superconductor

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dc.creatorXie, Wenhui
dc.creatorJepsen, O.
dc.creatorAndersen, O. K.
dc.creatorChen, Yulin
dc.creatorShen, Z. -X.
dc.date2006-07-07
dc.date2006-08-30
dc.date.accessioned2026-07-07T07:42:14Z
dc.date.available2026-07-07T07:42:14Z
dc.descriptionAn undoped cuprate with apical fluorine and inner (i) and outer (o) CuO2-layers is a 60 K superconductor whose Fermi surface (FS) has large n- and p-doped sheets with the SC gap on the n-sheet twice that on the p -sheet (Y. Chen et al.). The Fermi surface is not reproduced by the LDA, but the screening must be substantially reduced due to electronic correlations, and oxygen in the o-layers must be allowed to dimple outwards. This charges the i-layers by 0.01|e|, causes an 0.4 eV Madelung-potential difference between the i and o -layers, quenches the i-o hopping, and localizes the n-sheets onto the i-layers, thus protecting their d-wave pairs from being broken by scattering on impurities in the BaF layers. The correlation-reduced screening strengthens the coupling to z-axis phonons.
dc.description4 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0607198
dc.identifierhttp://arxiv.org/abs/cond-mat/0607198
dc.identifierdoi:10.1103/PhysRevLett.98.047001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/122371
dc.subjectSuperconductivity
dc.subjectDisordered Systems and Neural Networks
dc.titleInsights from ARPES for an undoped, four-layered, two-gap high-T_c superconductor
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