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Pairing symmetry and localization probed by electronic Raman scattering in disordered high-Tc superconductors

O. V. Misochko, K. Sakai, S. Nakashima, G. Gu

DOI 10.1103/PhysRevB.60.1326 · Physical Review B

T1

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Abstract

The study of electronic Raman spectra of deliberately disordered Bi2Sr2Ca(Cu1−xFex)2Oδ crystals has revealed that static (ω→0) limits of the ratio between the Raman susceptibilities from the superconducting and normal state show the universality expected for the gap with nodes. In addition, the B1g channel, where the static limits are slightly varied by the disorder, also demonstrates independence of impurity concentration for low-frequency Raman susceptibility, signaling that the nodes are shifted from the positions predicted by a pure d symmetry.

Source-reported materials — not catalogue approval

FormulaReported Tc (K)Pressure (GPa)Type
Bi2Sr2CaCu2O8

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90Pressure not reportedunknown
Bi2Sr2Ca(Cu0.995Fe0.005)2O8

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Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.

83Pressure not reportedunknown
Bi2Sr2Ca(Cu0.99Fe0.01)2O8

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Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.

75Pressure not reportedunknown
Bi2Sr2Ca(Cu0.985Fe0.015)2O8

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74Pressure not reportedunknown
Bi2Sr2Ca(Cu0.98Fe0.02)2O8

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72Pressure not reportedunknown
Bi2Sr2Ca(Cu0.97Fe0.03)2O8

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67Pressure not reportedunknown

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