title: Indirect electric field doping of the CuO2 planes of the cuprate NdBa2Cu3O7 superconductor.
abstract: The mechanism of field-effect doping in the 123 high critical temperature superconductors (HTS) has been investigated by x-ray absorption spectroscopy in the presence of an electric field. We demonstrate that holes are created at the CuO chains of the charge reservoir and that field-effect doping of the CuO(2) planes occurs by charge transfer, from the chains to the planes, of a fraction of the overall induced holes. The electronic properties of the charge reservoir and of the dielectric-HTS interface determine the electric field doping of the CuO(2) planes.
authors: CNR-INFM COHERENTIA, Dipartimento di Scienze Fisiche Università di Napoli Federico II, Complesso di Monte S. Angelo, Via Cinthia, 80126 Napoli, Italy. salluzzo@na.infn.it
authors: M
authors: M
authors: Salluzzo
authors: G
authors: G
authors: Ghiringhelli
authors: J C
authors: JC
authors: Cezar
authors: N B
authors: NB
authors: Brookes
authors: G M
authors: GM
authors: De Luca
authors: F
authors: F
authors: Fracassi
authors: R
authors: R
authors: Vaglio