Overdoped cuprates with high-temperature superconducting transitions

M. Marezio; O. Chmaissem; C. Bougerol; M. Karppinen; H. Yamauchi; T.H. Geballe

doi:10.1063/1.4817895

Overdoped cuprates with high-temperature superconducting transitions

M. Marezio, O. Chmaissem, C. Bougerol, M. Karppinen, H. Yamauchi, T.H. Geballe

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Abstract

Evidence for high-Tc cuprate superconductivity is found in a region of the phase diagram where non-superconducting Fermi liquid metals are expected. Cu valences estimated independently from both x-ray absorption near-edge spectroscopy and bond valence sum measurements are >2.3, and are in close agreement with each other for structures in the homologous series (Cu0.75Mo0.25)Sr2(Y,Ce)sCu2O5+2s+δ with s = 1, 2, 3, and 4. The record short apical oxygen distance, at odds with current theory, suggests the possibility of a new pairing mechanism. The possibility that the charge reservoir layers are able to screen long range coulomb interactions and thus enhance Tc is discussed.

Original language	English
Article number	021103
Pages (from-to)	1-7
Journal	Applied Physics Letters
Volume	1
Issue number	2
DOIs	https://doi.org/10.1063/1.4817895
Publication status	Published - 2013
MoE publication type	A1 Journal article-refereed

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title = "Overdoped cuprates with high-temperature superconducting transitions",

abstract = "Evidence for high-Tc cuprate superconductivity is found in a region of the phase diagram where non-superconducting Fermi liquid metals are expected. Cu valences estimated independently from both x-ray absorption near-edge spectroscopy and bond valence sum measurements are >2.3, and are in close agreement with each other for structures in the homologous series (Cu0.75Mo0.25)Sr2(Y,Ce)sCu2O5+2s+δ with s = 1, 2, 3, and 4. The record short apical oxygen distance, at odds with current theory, suggests the possibility of a new pairing mechanism. The possibility that the charge reservoir layers are able to screen long range coulomb interactions and thus enhance Tc is discussed.",

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AU - Marezio, M.

AU - Chmaissem, O.

AU - Bougerol, C.

AU - Karppinen, M.

AU - Yamauchi, H.

AU - Geballe, T.H.

PY - 2013

Y1 - 2013

N2 - Evidence for high-Tc cuprate superconductivity is found in a region of the phase diagram where non-superconducting Fermi liquid metals are expected. Cu valences estimated independently from both x-ray absorption near-edge spectroscopy and bond valence sum measurements are >2.3, and are in close agreement with each other for structures in the homologous series (Cu0.75Mo0.25)Sr2(Y,Ce)sCu2O5+2s+δ with s = 1, 2, 3, and 4. The record short apical oxygen distance, at odds with current theory, suggests the possibility of a new pairing mechanism. The possibility that the charge reservoir layers are able to screen long range coulomb interactions and thus enhance Tc is discussed.

AB - Evidence for high-Tc cuprate superconductivity is found in a region of the phase diagram where non-superconducting Fermi liquid metals are expected. Cu valences estimated independently from both x-ray absorption near-edge spectroscopy and bond valence sum measurements are >2.3, and are in close agreement with each other for structures in the homologous series (Cu0.75Mo0.25)Sr2(Y,Ce)sCu2O5+2s+δ with s = 1, 2, 3, and 4. The record short apical oxygen distance, at odds with current theory, suggests the possibility of a new pairing mechanism. The possibility that the charge reservoir layers are able to screen long range coulomb interactions and thus enhance Tc is discussed.

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JO - Applied Physics Letters

JF - Applied Physics Letters

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Overdoped cuprates with high-temperature superconducting transitions

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