Magnetic penetration depth in electron-doped cuprates - evidence for gap nodes

R. Prozorov; R. W. Giannetta; P. Fournier; R. L. Greene

doi:10.1016/S0921-4534(00)00945-X

Magnetic penetration depth in electron-doped cuprates - evidence for gap nodes

Superconductivity 2009-10-31 v1

Authors: R. Prozorov , R. W. Giannetta , P. Fournier , R. L. Greene

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Abstract

The in-plane penetration depth \lambda(T) is measured in electron-doped single crystals Nd1.85Ce0.15CuO4-x (NCCO) and Pr1.85Ce0.15CuO4-x (PCCO) using a 11 MHz LC resonator. In NCCO, \lambda(T) exhibits a minimum at 3.8 K and a pronounced upturn down to 0.4 K due to the paramagnetic contribution of Nd3+ ions. The London penetration depth contribution is linear in T. The paramagnetic contribution is absent in PCCO, where \lambda(T)~T^2 at low temperatures. Our results indicate the presence of nodes in the superconducting gap, i.e., non s-wave symmetry of the order parameter in electron-doped cuprates.

Keywords

penetration depth gap nodes electron-doped cuprates superconducting gap order parameter symmetry

Cite

@article{arxiv.cond-mat/9912001,
  title  = {Magnetic penetration depth in electron-doped cuprates - evidence for gap nodes},
  author = {R. Prozorov and R. W. Giannetta and P. Fournier and R. L. Greene},
  journal= {arXiv preprint arXiv:cond-mat/9912001},
  year   = {2009}
}

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2 pages Acrobat-3 optimized PDF. To be presented at M2S-HTSC-VI

Magnetic penetration depth in electron-doped cuprates - evidence for gap nodes

Abstract

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