Phase-sensitive Evidence for d-wave Pairing Symmetry in Electron-doped Cuprate Superconductors

C. C. Tsuei; J. R. Kirtley

doi:10.1103/PhysRevLett.85.182

Phase-sensitive Evidence for d-wave Pairing Symmetry in Electron-doped Cuprate Superconductors

Superconductivity 2009-10-31 v2

Authors: C. C. Tsuei , J. R. Kirtley

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Abstract

We present phase-sensitive evidence that the electron-doped cuprates Nd1.85Ce0.15CuO4-y (NCCO) and Pr1.85Ce0.15CuO4-y (PCCO) have d-wave pairing symmetry. This evidence was obtained by observing the half-flux quantum effect, using a scanning SQUID microscope, in c-axis oriented films of NCCO or PCCO epitaxially grown on tricrystal [100] SrTiO3 substrates designed to be frustrated for a d(x2-y2) order parameter. Samples with two other configurations, designed to b unfrustrated for a d-wave superconductor, do not show the half-flux quantum effect.

Keywords

d-wave pairing cuprate superconductor half-flux quantum scanning SQUID phase-sensitive evidence

Cite

@article{arxiv.cond-mat/0002341,
  title  = {Phase-sensitive Evidence for d-wave Pairing Symmetry in Electron-doped Cuprate Superconductors},
  author = {C. C. Tsuei and J. R. Kirtley},
  journal= {arXiv preprint arXiv:cond-mat/0002341},
  year   = {2009}
}

Comments

4 pages, Latex, 4 figures

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