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Superfluid density and angular dependence of the energy gap in optimally doped (BiPb)2(SrLa)2CuO6+ δ


Strässle, S; Khasanov, R; Kondo, T; Heron, D O G; Kaminski, A; Keller, H; Lee, S L; Takeuchi, T (2009). Superfluid density and angular dependence of the energy gap in optimally doped (BiPb)2(SrLa)2CuO6+ δ. Journal of Superconductivity and Novel Magnetism, 22(2):189-193.

Abstract

We present a muon-spin rotation study of the optimally doped cuprate superconductor (BiPb)2(SrLa)2 CuO6+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.

Abstract

We present a muon-spin rotation study of the optimally doped cuprate superconductor (BiPb)2(SrLa)2 CuO6+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.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:February 2009
Deposited On:26 Mar 2009 07:36
Last Modified:06 Dec 2017 19:21
Publisher:Springer
ISSN:1557-1939
Additional Information:Muon-spin rotation experiments - Cuprates - Suppressed superfluid density - Superconducting gap - Pseudogap
Publisher DOI:https://doi.org/10.1007/s10948-008-0395-z

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