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Evidence for a Competition between the Superconducting State and the Pseudogap State of (BiPb)2(SrLa)2CuO6+δ from Muon Spin Rotation Experiments

R. Khasanov, Takeshi Kondo, S. Strässle, D. O. G. Heron, A. Kaminski, H. Keller, S. L. Lee, Tsunehiro Takeuchi

DOI 10.1103/PhysRevLett.101.227002 · Physical Review Letters

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Abstract

The in-plane magnetic penetration depth λab in optimally doped (BiPb)2(SrLa)2CuO6+δ (OP Bi2201) was studied by means of muon-spin rotation. The measurements of λab−2(T) are inconsistent with a simple model of a d-wave order parameter and a uniform quasiparticle weight around the Fermi surface. The data are well described assuming the angular gap symmetry obtained in ARPES experiments [Phys. Rev. Lett. 98, 267004 (2007)], which suggest that the superconducting gap in OP Bi2201 exists only in segments of the Fermi surface near the nodes. The remaining parts of the Fermi surface, which are strongly affected by the pseudogap state, do not contribute significantly to the superconducting condensate.

Source-reported materials — not catalogue approval

FormulaReported Tc (K)Pressure (GPa)Type
(BiPb)2(SrLa)2CuO6+δ

Archive — visibility unverified

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

35Pressure not reportedunknown
(BiPb)2(SrLa)2CuO6+δ

Archive — visibility unverified

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

35Pressure not reportedunknown

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