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Non-Fermi liquid and pairing in electron-doped cuprates

Pavel Krotkov·Andrey V. Chubukov
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Abstract

We study the normal state and pairing instability in electron-doped cuprates near optimal doping. We show that the fermionic self-energy has a non-Fermi liquid form leading to peculiar frequency dependencies of the conductivity and the Raman response. We solve the pairing problem and demonstrate that T_c is determined by the curvature of the Fermi surface, and the pairing gap Δ(k,ω) is strongly non-monotonic along the Fermi surface. The normal state frequency dependencies, the value of T_c\sim10K and the k-dependence of the gap agree with the experiment.

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Pavel Krotkov, Andrey V. Chubukov. 2005-11-29. Non-Fermi liquid and pairing in electron-doped cuprates. https://doi.org/10.1103/physrevlett.96.107002

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