Direct measurement of charge transfer phenomena at ferromagnetic/superconducting oxide interfaces

M. Varela; A. R. Lupini; V. Pena; Z. Sefrioui; I. Arslan; N. D. Browning; J. Santamaria; S. J. Pennycook

Direct measurement of charge transfer phenomena at ferromagnetic/superconducting oxide interfaces

Other Condensed Matter 2007-05-23 v2

Authors: M. Varela , A. R. Lupini , V. Pena , Z. Sefrioui , I. Arslan , N. D. Browning , J. Santamaria , S. J. Pennycook

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Abstract

YBa2Cu3O7-x/La0.67Ca0.33MnO3 ferromagnetic/superconducting interfaces are analyzed by scanning transmission electron microscopy and electron energy loss spectroscopy with monolayer resolution. We demonstrate that extensive charge transfer occurs between the manganite and the superconductor, in a manner similar to modulation-doped semiconductors, which explains the reduced critical temperatures of heterostructures. This behavior is not seen with insulating PrBa2Cu3O7 layers. Furthermore, we confirm directly that holes in the YBa2Cu3O7-x are located on the CuO2 planes.

Keywords

charge transfer ferromagnetic/superconducting interface YBCO electron energy loss spectroscopy scanning transmission electron microscopy

Cite

@article{arxiv.cond-mat/0508564,
  title  = {Direct measurement of charge transfer phenomena at ferromagnetic/superconducting oxide interfaces},
  author = {M. Varela and A. R. Lupini and V. Pena and Z. Sefrioui and I. Arslan and N. D. Browning and J. Santamaria and S. J. Pennycook},
  journal= {arXiv preprint arXiv:cond-mat/0508564},
  year   = {2007}
}

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16 pages, 4 figures

Direct measurement of charge transfer phenomena at ferromagnetic/superconducting oxide interfaces

Abstract

Keywords

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