Evidence for a competition between the superconducting state and the pseudogap state of (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; from muon spin rotation experiments

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

doi:10.1103/PhysRevLett.101.227002

Evidence for a competition between the superconducting state and the pseudogap state of (BiPb)₂(SrLa)₂CuO_6+δ from muon spin rotation experiments

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

Citation

Khasanov, R., Kondo, T., Strässle, S., Heron, D. O. G., Kaminski, A., Keller, H., … Takeuchi, T. (2008). Evidence for a competition between the superconducting state and the pseudogap state of (BiPb)₂(SrLa)₂CuO_6+δ from muon spin rotation experiments. Physical Review Letters, 101(22), 227002 (4 pp.). https://doi.org/10.1103/PhysRevLett.101.227002

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:19120

The in-plane magnetic penetration depth λ_ab in optimally doped (BiPb)₂(SrLa)₂CuO_6+δ (OP Bi2201) was studied by means of muon-spin rotation. The measurements of λ_ab⁻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.