Signature of the nonmonotonic d -wave gap in electron-doped cuprates

Ilya Eremin, Evelina Tsoncheva, Andrey V. Chubukov

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We address the issue whether the data on optical conductivity and Raman scattering in electron-doped cuprates below Tc support the idea that the d -wave gap in these materials is nonmonotonic along the Fermi surface. We calculate the conductivity and Raman intensity for elastic scattering and find that a nonmonotonic gap gives rise to several specific features in optical and Raman response functions. We argue that all these features are present in the experimental data on Nd2-x Cex Cu O4 and Pr2-x Cex Cu O4 compounds.

Original languageEnglish (US)
Article number024508
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number2
StatePublished - Jan 14 2008

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