Nonmonotonic dx(2)-y(2) superconducting order parameter in Nd2-xCexCuO4

Girsh Blumberg, A. Koitzsch, A. Gozar, B. S. Dennis, C. A. Kendziora, P. Fournier, R. L. Greene

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143 Scopus citations


A nonmonotonic d(x2-y2) superconducting order parameter was revealed by low energy polarized electronic Raman scattering of the electron-doped superconductor Nd2-xCexCuO4 (NCCO). It had a maximum gap of 4.4 kBTc at Fermi surface intersections with an antiferromagnetic Brillouin zone. A smaller gap of 3.3 kBTc at fermionic Brillouin zone boundaries was also observed. The role of antiferromagnetic fluctuations and the similarity in the origin of superconductivity for electron and hole-doped cuprates were emphasized by the gap enhancement in the vicinity of the hot spots.

Original languageEnglish (US)
Article number107002
Pages (from-to)1070021-1070024
Number of pages4
JournalPhysical Review Letters
Issue number10
StatePublished - Mar 11 2002
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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