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. Straessle, D. O. G. Heron, A. Kaminski, H. Keller, Stephen Leslie Lee, Tsunehiro Takeuchi

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23 Citations (Scopus)

Abstract

The in-plane magnetic penetration depth lambda(ab) in optimally doped (BiPb)(2)(SrLa)(2)CuO6+delta (OP Bi2201) was studied by means of muon-spin rotation. The measurements of lambda(-2)(ab)(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.

Original languageEnglish
Article number227002
Number of pages4
JournalPhysical Review Letters
Volume101
Issue number22
DOIs
Publication statusPublished - 28 Nov 2008

Keywords

  • HIGH MAGNETIC-FIELDS
  • VORTEX STATE
  • UNDERDOPED BI2212
  • PENETRATION DEPTH
  • SINGLE-CRYSTAL
  • DEPENDENCE
  • BI2.15SR1.85CACU2O8+DELTA
  • CROSSOVER
  • LATTICE
  • GAP

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