Comment on: Nonmonotonic $d_{x^2-y^2}$ Superconducting Order Parameter in Nd${}_{2-x}$Ce${}_x$CuO${}_4$

Abstract

In a recent letter Blumberg and collaborators claim that a non-monotonic $d_{x^2-y^2}$ form for the superconducting order parameter is required to explain their Raman scattering measurements in Nd${}_{2-x}$Ce${}_x$CuO${}_4$ . In this comment we show with a simple model calculation that the basis for this conclusion is insufficient. The proposed functional dependence of the gap is neither consistent with their measured spectra nor compatible with other experimental results. Therefore the issue of the superconduing gap in electron-doped systems cannot be considered solved by now.

Comment to the paper by Blumberg et al., Phys. Rev. Lett., 88, 107002 (2002)

References in corpus (3)

• Nonmonotonic d_{x^2-y^2} Superconducting Order Parameter in Nd_{2-x}Ce_xCuO_4
• Evidence for a Transition in the Pairing Symmetry of the Electron-Doped Cuprates La_{2-x}Ce_xCuO_{4-y} and Pr_{2-x}Ce_xCuO_{4-y}
• Evidence for a Nodeless Gap from the Superfluid Density of Optimally Doped Pr_{1.855}Ce_{0.145}CuO_{4-y} Films

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• Signatures of non-monotonic d-wave gap in electron-doped cuprates
• Superconductivity in electron-doped cuprates: Gap shape change and symmetry crossover with doping
• Gap function symmetry and spin dynamics in electron-doped cuprate superconductor
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