Superconducting Properties of Two-Orbital t-t'-J-J' Models

2008/08/20 by Feng Lu, Liang‐Jian Zou, Lu, Feng +2
Physics and Astronomy · #Black Holes and Theoretical Physics #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions #Superconductivity (cond-mat.supr-con) #cond-mat.mtrl-sci #cond-mat.supr-con

paper · pdf · doi:10.48550/arxiv.0808.2763

some references are added, the typos are corrected

openalex publication_date 2008/08/20 · arxiv created 2008/09/02 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Motivated by the recent contradiction of the superconducting pairing symmetry in the angle-resolved photoemission spectra (ARPES) and the nuclear magnetic resonance (NMR) data in the FeAs superconductors, we present the theoretical results on the phase diagram, the temperature dependent Fermi surfaces in normal state, the ARPES character of quasiparticles and the spin-lattice relaxation 1/T₁ of the two-orbital t-t^'-J-J^' models. Our results show that most of the properties observed in iron-based superconductors could be comprehensively understood in the present scenario qualitatively, indicating that the pairing symmetry of the ironpnictides is anisotropic nodeless s-wave, mainly originating from the band structures and the Fermi surface topology.

Related

• Strong Coupling Theory for Superconducting Iron Pnictides
• Near-degeneracy of several pairing channels in multiorbital models for the Fe-pnictides
• Orbital degeneracy and the microscopic model of the FeAs plane in the iron-based superconductors
• Orbital-driven two-dome superconducting phases in iron-based superconductors
• Model for the Magnetic Order and Pairing Channels in Fe Pnictide Superconductors