Characteristics of oxygen over-reduced Nd1.85Ce0.15CuO4-y films

S. N. Mao; Wu Jiang; X. X. Xi; Qi Li; J. L. Peng; R. L. Greene; T. Venkatesan; D. Prasad Beesabathina; L. Salamanca-Riba; X. D. Wu

doi:10.1063/1.113928

Characteristics of oxygen over-reduced Nd_1.85Ce_0.15CuO_4-y films

S. N. Mao, Wu Jiang, X. X. Xi, Qi Li, J. L. Peng, R. L. Greene, T. Venkatesan, D. Prasad Beesabathina, L. Salamanca-Riba, X. D. Wu

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Abstract

We have studied the oxygen doping effect in thin Nd_1.85Ce_0.15CuO_4-y (NCCO) films. Contrary to the common believe that the disappearance of superconductivity in the over-reduced NCCO samples is a consequence of phase decomposition, we found that there exists an over-reduced region in which the crystallographic structure of the film remains essentially the same as in the optimum-oxygen doped region, but the film becomes insulating. Rutherford backscattering spectroscopy channeling analysis reveals that the oxygen over-reduction increases atomic distortion in the lattice. This work provides strong support to previous transport studies by Jiang et al. [Phys. Rev. Lett. 73, 1291 (1994)], which suggested the existence of both electron and hole carriers in superconducting NCCO.

Original language	English (US)
Pages (from-to)	2137
Number of pages	1
Journal	Applied Physics Letters
DOIs	https://doi.org/10.1063/1.113928
State	Published - 1995

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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title = "Characteristics of oxygen over-reduced Nd1.85Ce0.15CuO4-y films",

abstract = "We have studied the oxygen doping effect in thin Nd1.85Ce0.15CuO4-y (NCCO) films. Contrary to the common believe that the disappearance of superconductivity in the over-reduced NCCO samples is a consequence of phase decomposition, we found that there exists an over-reduced region in which the crystallographic structure of the film remains essentially the same as in the optimum-oxygen doped region, but the film becomes insulating. Rutherford backscattering spectroscopy channeling analysis reveals that the oxygen over-reduction increases atomic distortion in the lattice. This work provides strong support to previous transport studies by Jiang et al. [Phys. Rev. Lett. 73, 1291 (1994)], which suggested the existence of both electron and hole carriers in superconducting NCCO.",

author = "Mao, {S. N.} and Wu Jiang and Xi, {X. X.} and Qi Li and Peng, {J. L.} and Greene, {R. L.} and T. Venkatesan and Beesabathina, {D. Prasad} and L. Salamanca-Riba and Wu, {X. D.}",

year = "1995",

doi = "10.1063/1.113928",

language = "English (US)",

pages = "2137",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

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TY - JOUR

T1 - Characteristics of oxygen over-reduced Nd1.85Ce0.15CuO4-y films

AU - Mao, S. N.

AU - Jiang, Wu

AU - Xi, X. X.

AU - Li, Qi

AU - Peng, J. L.

AU - Greene, R. L.

AU - Venkatesan, T.

AU - Beesabathina, D. Prasad

AU - Salamanca-Riba, L.

AU - Wu, X. D.

PY - 1995

Y1 - 1995

N2 - We have studied the oxygen doping effect in thin Nd1.85Ce0.15CuO4-y (NCCO) films. Contrary to the common believe that the disappearance of superconductivity in the over-reduced NCCO samples is a consequence of phase decomposition, we found that there exists an over-reduced region in which the crystallographic structure of the film remains essentially the same as in the optimum-oxygen doped region, but the film becomes insulating. Rutherford backscattering spectroscopy channeling analysis reveals that the oxygen over-reduction increases atomic distortion in the lattice. This work provides strong support to previous transport studies by Jiang et al. [Phys. Rev. Lett. 73, 1291 (1994)], which suggested the existence of both electron and hole carriers in superconducting NCCO.

AB - We have studied the oxygen doping effect in thin Nd1.85Ce0.15CuO4-y (NCCO) films. Contrary to the common believe that the disappearance of superconductivity in the over-reduced NCCO samples is a consequence of phase decomposition, we found that there exists an over-reduced region in which the crystallographic structure of the film remains essentially the same as in the optimum-oxygen doped region, but the film becomes insulating. Rutherford backscattering spectroscopy channeling analysis reveals that the oxygen over-reduction increases atomic distortion in the lattice. This work provides strong support to previous transport studies by Jiang et al. [Phys. Rev. Lett. 73, 1291 (1994)], which suggested the existence of both electron and hole carriers in superconducting NCCO.

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JO - Applied Physics Letters

JF - Applied Physics Letters

ER -

Characteristics of oxygen over-reduced Nd_1.85Ce_0.15CuO_4-y films

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