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29 March 2024
 
  » arxiv » cond-mat/0606175

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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 ;
Date 7 Jun 2006
Subject Superconductivity
AbstractThe 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.
Source arXiv, cond-mat/0606175
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