2011/04/25 by Keisuke Shigeta, Seiichiro Onari, Yukio Tanaka
Materials Science · Mathematics · Physics and Astronomy · #Antiferromagnetism #Condensed matter physics #Field (mathematics) #Magnetic and transport properties of perovskites and related materials #Mathematics #Pairing #Phase (matter) #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum mechanics #Random phase approximation #Spin (aerodynamics) #Superconductivity #Symmetry (geometry) #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.85.224509
published as Phys. Rev. B 85, 224509 (2012) · 4 pages, 5 figures
arxiv created 2011/04/25 · openalex publication_date 2012/06/07 · arxiv updated 2013/02/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In order to investigate the symmetry of a superconducting (SC) pairing state in a staggered field, we solve the linearized 'Eliashberg's equation based on the random phase approximation and the fluctuation exchange approximation in the Hubbard model under a staggered field. We show that an odd-frequency spin-triplet (equal-spin) s-wave pairing state can be realized in the system. It is caused by the fact that the staggered field suppresses the in-plane spin susceptibility and enhances the charge susceptibility. The latter is due to a spin-dependent modulation in the electron density. The result suggests that the antiferromagnetic (AF) background gives a contribution inherently different from the AF spin fluctuation to SC pairing state.