Superfluid density and angular dependence of the energy gap in optimally doped (BiPb)&lt;sub&gt;2&lt;/sub&gt;(SrLa)&lt;sub&gt;2&lt;/sub&gt;CuO&lt;sub&gt;6+&lt;em&gt;δ&lt;/em&gt;&lt;/sub&gt;

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

doi:10.1007/s10948-008-0395-z

Superfluid density and angular dependence of the energy gap in optimally doped (BiPb)₂(SrLa)₂CuO_6+δ

Strässle S, Khasanov R, Kondo T, Heron DOG, Kaminski A, Keller H, Lee SL & Takeuchi T

Citation

Strässle, S., Khasanov, R., Kondo, T., Heron, D. O. G., Kaminski, A., Keller, H., … Takeuchi, T. (2009). Superfluid density and angular dependence of the energy gap in optimally doped (BiPb)₂(SrLa)₂CuO_6+δ. Journal of Superconductivity and Novel Magnetism, 22(2), 189-193. https://doi.org/10.1007/s10948-008-0395-z

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:17254

We present a muon-spin rotation study of the optimally doped cuprate superconductor (BiPb)₂(SrLa)₂CuO_6+δ. The measured magnetic field dependence of the in-plane magnetic penetration λ_ab suggests superconductivity with a dominant d-wave order parameter. The comparison of the temperature dependence of λ_ab with calculations, assuming the angular gap symmetry as obtained from photoemission measurements, is consistent with a partial suppression of the quasi-particle weight towards the anti-nodal region of the Fermi surface. This suggests that the superconducting and the pseudogap state are dominated by different parts of the Fermi surface.