Evidence for complex order parameter in La_{1.83}Sr_{0.17}CuO_4

R. Khasanov; A. Shengelaya; A. Maisuradze; F. La Mattina; A. Bussmann-Holder; H. Keller; K. A. Müller

doi:10.1103/PhysRevLett.98.057007

Evidence for complex order parameter in La_{1.83}Sr_{0.17}CuO_4

Superconductivity 2009-11-11 v1

Authors: R. Khasanov , A. Shengelaya , A. Maisuradze , F. La Mattina , A. Bussmann-Holder , H. Keller , K. A. Müller

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Abstract

The in-plane magnetic field penetration depth (\lambda_{ab}) in single-crystal La_{1.83}Sr_{0.17}CuO_4 was investigated by means of the muon-spin rotation (\muSR) technique. The temperature dependence of \lambda^{-2}_{ab} has an inflection point around 10-15K, suggesting the presence of two superconducting gaps: a large gap (\Delta_1^d) with d-wave and a small gap (\Delta_2^s) with s-wave symmetry. The zero-temperature values of the gaps at \mu_0H=0.02T were found to be \Delta_1^d(0)=8.2(2)meV and \Delta_2^s(0)=1.57(8)meV.

Keywords

magnetic materials and spin systems frustrated magnetism spin excitations in condensed matter

Cite

@article{arxiv.cond-mat/0606175,
  title  = {Evidence for complex order parameter in La_{1.83}Sr_{0.17}CuO_4},
  author = {R. Khasanov and A. Shengelaya and A. Maisuradze and F. La Mattina and A. Bussmann-Holder and H. Keller and K. A. Müller},
  journal= {arXiv preprint arXiv:cond-mat/0606175},
  year   = {2009}
}

Comments

5 pages, 3 figures

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