2005/11/29 by Pavel Krotkov, Andrey V. Chubukov · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Antiferromagnetism #Condensed matter physics #Cuprate #Electron #Electron pair #Fermi Gamma-ray Space Telescope #Fermi gas #Fermi liquid theory #Fermi surface #Instability #Magnetic and transport properties of perovskites and related materials #Pairing #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spin (aerodynamics) #Superconductivity #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.96.107002
published as Phys. Rev. Lett. 96, 107002 (2006) · 4 pages, 4 figures
arxiv created 2005/11/29 · openalex publication_date 2006/03/13 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the normal state and pairing instability in electron-doped cuprates in a model with long-ranged antiferromagnetic spin fluctuations close to an antiferromagnetic quantum-critical point. 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 delta (kappa, omega) is strongly nonmonotonic along the Fermi surface. The normal state frequency dependencies, the value of T(c) is approximately 10 K, and the kappa dependence of the gap agree with the experiment.