Emergent transition for superconducting fluctuations in antiferromagnetic ruthenocuprates

Abbie McLaughlin, J.P. Attfield

Research output: Contribution to journalLetter

Abstract

The emergence of carrier pairing from the electronically inhomogeneous phase of lightly hole-doped copper oxides has been investigated through magnetoresistance measurements on 1222-type ruthenocuprates RuSr2(R,Ce)(2)Cu2O10-delta, principally with R = Gd, Sm, Nd. A well-defined transition at which superconducting fluctuations emerge is discovered at a remarkably low critical doping, p(c) = 0.0084, deep within the antiferromagnetic phase. Systematic variations of the low-temperature fluctuation density with doping and cell volume demonstrate the intrinsic nature of the electronic inhomogeneity and provide new support for bosonic models of the superconducting mechanism.
Original languageEnglish
Article number220509(R)
JournalPhysical Review B Condensed Matter and Materials Physics
Volume90
Issue number22
DOIs
Publication statusPublished - 15 Dec 2014

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Doping (additives)
Copper oxides
Magnetoresistance
copper oxides
inhomogeneity
cells
electronics
Temperature

Keywords

  • superconductivity
  • magnetoresistance
  • pseudogap

Cite this

Emergent transition for superconducting fluctuations in antiferromagnetic ruthenocuprates. / McLaughlin, Abbie; Attfield, J.P.

In: Physical Review B Condensed Matter and Materials Physics , Vol. 90, No. 22, 220509(R), 15.12.2014.

Research output: Contribution to journalLetter

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AB - The emergence of carrier pairing from the electronically inhomogeneous phase of lightly hole-doped copper oxides has been investigated through magnetoresistance measurements on 1222-type ruthenocuprates RuSr2(R,Ce)(2)Cu2O10-delta, principally with R = Gd, Sm, Nd. A well-defined transition at which superconducting fluctuations emerge is discovered at a remarkably low critical doping, p(c) = 0.0084, deep within the antiferromagnetic phase. Systematic variations of the low-temperature fluctuation density with doping and cell volume demonstrate the intrinsic nature of the electronic inhomogeneity and provide new support for bosonic models of the superconducting mechanism.

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