Polarized electronic Raman scattering from the Nd1.85Ce0.15CuO4, superconductor at optimal electron doping (Tc = 22 K) reveals the formation of an anisotropic pseudogap below a characteristic temperature T* ≈ 220 K and energy Eg* = 850 cm−1. Below T* a pronounced suppression of the incoherent spectral weight below Eg* = 850 cm−1 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.
|Original language||English (US)|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - May 30 2003|
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics