Low-energy excitations around (π/2, π/2) points in the pseudogap phase of Nd_1.85Ce_0.15CuO_4

Abstract

Polarized electronic Raman scattering from the NCCO superconductor at optimal electron doping (T_c=22 K) reveals the formation of an anisotropic pseudogap below a characteristic temperature T* ~ 220 K and energy E*_g = 850 cm-1. Below T* a pronounced suppression of the incoherent spectral weight below E*_g in the nodal directions of k-space is observed. This is concomitant with the emergence of long-lived excitations in the vicinity of the (π/2, π/2) points that do not contribute to the optical conductivity.

arXiv comment4 pages, 3 figs

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• Evolution of Superconductivity in Electron-Doped Cuprates: Magneto-Raman Spectroscopy
• Quantum-critical pairing in electron-doped cuprates
• Nernst Effect in Electron-Doped Pr${}_{2-x}$Ce${}_x$CuO${}_4$
• Non-Fermi liquid and pairing in electron-doped cuprates
• Theory of non-Fermi liquid and pairing in electron-doped cuprates
• An Investigation of Particle-Hole Asymmetry in the Cuprates via Electronic Raman Scattering
• Dielectric response of electrons with strong local correlations and long-ranged Coulomb interactions
• Nonresonant Raman Scattering in Extremely Correlated Fermi Liquids
• Theory of anisotropic elastoresistivity of two-dimensional extremely strongly correlated metals
• The short-range correlations of a doped Mott insulator