With the aim of disentangling the role of the constituent blocks in the high-T-c cuprate superconductors we have measured x-ray absorption spectra at the Cu L-3 edge on (Cu1-delta C delta)Ba-2 CuOx (BCO), CaCuO2 (CCO), and BCO/CCO superconducting superlattices obtained by stacking in a sequence the two blocks. By observing the polarization dependence we could discriminate between the in-plane and out-of-plane hole densities. The results strongly indicate that charge is redistributed across the interfaces from the BCO charge reservoir block to the CCO infinite layer block. In the superconducting samples a relatively high density of out-of-plane holes is still present, whereas when the CCO layer thickness is excessive the holes appear to have preferential in-plane orientation and superconductivity is suppressed.
Tipologia: | Articolo su rivista |
Citazione: | Aruta, C., Ghiringhelli, G., Dallera, C., Fracassi, F., Medaglia, P.G., Tebano, A., et al. (2008). Hole redistribution across interfaces in superconducting cuprates superlattices. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 78(20). |
Lingua: | English |
Settore Scientifico Disciplinare: | Settore FIS/03 - Fisica della Materia |
Revisione (peer review): | Sì, ma tipo non specificato |
Tipo: | Articolo |
Rilevanza: | Rilevanza internazionale |
Digital Object Identifier (DOI): | 10.1103/PhysRevB.78.205120 |
Stato di pubblicazione: | Pubblicato |
Data di pubblicazione: | 2008 |
Titolo: | Hole redistribution across interfaces in superconducting cuprates superlattices |
Autori: | |
Autori: | Aruta, C; Ghiringhelli, G; Dallera, C; Fracassi, F; Medaglia, P G; Tebano, A; Brookes, N B; Braicovich, L; Balestrino, G |
Appare nelle tipologie: | 01 - Articolo su rivista |