Low-energy excitations around(π/2,π/2)points in the pseudogap phase ofNd1.85Ce0.15CuO4

2003/04/08 by A. Koitzsch, G. Blumberg, A. Gozar +3
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.67.184522

4 pages, 3 figs

arxiv created 2003/04/08 · openalex publication_date 2003/05/30 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Polarized electronic Raman scattering from the Nd_1.85Ce_0.15CuO₄, superconductor at optimal electron doping (T_c=22K) reveals the formation of an anisotropic pseudogap below a characteristic temperature T^*\ensuremath≈220K and energy E_g^*=850cm^\ensuremath-1. Below T^* a pronounced suppression of the incoherent spectral weight below E_g^*=850cm^\ensuremath-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 (\ifmmode±\else\textpm\fi\ensuremathπ/2,\ifmmode±\else\textpm\fi\ensuremathπ/2) points that do not contribute to the optical conductivity.

Citations

• Evidence for a Transition in the Pairing Symmetry of the Electron-Doped CupratesLa2−xCexCuO4−yandPr2−xCexCuO4−y
• Doping dependence of the pseudogap inLa2−xSrxCuO4
• Breakdown of Fermi-liquid theory in a copper-oxide superconductor
• Evolution of Magnetic and Superconducting Fluctuations with Doping of High-TcSuperconductors
• Destruction of the Fermi surface in underdoped high-Tc superconductors
• The pseudogap in high-temperature superconductors: an experimental survey
• Electronic states in the antiferromagnetic phase of electron-doped high-Tccuprates