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arXiv · 0801.1878

Indirect electric field doping of the CuO2 planes of the cuprate NdBa2Cu3O7 superconductor

M. Salluzzo·G. Ghiringhelli·J. C. Cezar·N. B. Brookes·G. M. De Luca·F. Fracassi·R. Vaglio
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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 CuO2 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 CuO2 planes

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M. Salluzzo, G. Ghiringhelli, J. C. Cezar, N. B. Brookes, G. M. De Luca, F. Fracassi, R. Vaglio. 2008-01-14. Indirect electric field doping of the CuO2 planes of the cuprate NdBa2Cu3O7 superconductor. https://doi.org/10.1103/physrevlett.100.056810

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