Defect-induced superconductivity in PrBa2Cu3O7

M. Muroi; Robert Street

doi:10.1016/S0921-4534(99)00146-X

Defect-induced superconductivity in PrBa2Cu3O7

M. Muroi, Robert Street

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

The appearance of superconductivity in some PrBa(2)Cu(3)Q(7) (y similar to 7) single crystals and thin films can be accounted for on the assumption of the presence of disorder in the Ba/Pr site occupancy. It is argued that Pa ions occupying the Pr site and Pr ions occupying the Ba site both weaken Pr-O hybridisation through local structural changes and lower the Madelung potential at the Cu site relative to that at the Pr site, thus favouring the Cu-III oxidation state over the Pr-IV oxidation state. Bulk superconductivity shows up when local superconducting regions, created near the defects, percolate through the sample. It is concluded that stoichiometric, defect-free PrBa2Cu3O7 is insulating. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

Original language	English
Pages (from-to)	172-182
Journal	Physica C
Volume	314
Issue number	N/A
DOIs	https://doi.org/10.1016/S0921-4534(99)00146-X
Publication status	Published - 1999

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title = "Defect-induced superconductivity in PrBa2Cu3O7",

abstract = "The appearance of superconductivity in some PrBa(2)Cu(3)Q(7) (y similar to 7) single crystals and thin films can be accounted for on the assumption of the presence of disorder in the Ba/Pr site occupancy. It is argued that Pa ions occupying the Pr site and Pr ions occupying the Ba site both weaken Pr-O hybridisation through local structural changes and lower the Madelung potential at the Cu site relative to that at the Pr site, thus favouring the Cu-III oxidation state over the Pr-IV oxidation state. Bulk superconductivity shows up when local superconducting regions, created near the defects, percolate through the sample. It is concluded that stoichiometric, defect-free PrBa2Cu3O7 is insulating. (C) 1999 Published by Elsevier Science B.V. All rights reserved.",

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AU - Street, Robert

PY - 1999

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N2 - The appearance of superconductivity in some PrBa(2)Cu(3)Q(7) (y similar to 7) single crystals and thin films can be accounted for on the assumption of the presence of disorder in the Ba/Pr site occupancy. It is argued that Pa ions occupying the Pr site and Pr ions occupying the Ba site both weaken Pr-O hybridisation through local structural changes and lower the Madelung potential at the Cu site relative to that at the Pr site, thus favouring the Cu-III oxidation state over the Pr-IV oxidation state. Bulk superconductivity shows up when local superconducting regions, created near the defects, percolate through the sample. It is concluded that stoichiometric, defect-free PrBa2Cu3O7 is insulating. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

AB - The appearance of superconductivity in some PrBa(2)Cu(3)Q(7) (y similar to 7) single crystals and thin films can be accounted for on the assumption of the presence of disorder in the Ba/Pr site occupancy. It is argued that Pa ions occupying the Pr site and Pr ions occupying the Ba site both weaken Pr-O hybridisation through local structural changes and lower the Madelung potential at the Cu site relative to that at the Pr site, thus favouring the Cu-III oxidation state over the Pr-IV oxidation state. Bulk superconductivity shows up when local superconducting regions, created near the defects, percolate through the sample. It is concluded that stoichiometric, defect-free PrBa2Cu3O7 is insulating. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

U2 - 10.1016/S0921-4534(99)00146-X

DO - 10.1016/S0921-4534(99)00146-X

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VL - 314

SP - 172

EP - 182

JO - Physica C

JF - Physica C

IS - N/A

ER -

Defect-induced superconductivity in PrBa2Cu3O7

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