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

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

2008-08-20

arxiv.org/abs/0808.2763v2

Physics

Condensed Matter

Superconductivity

some references are added, the typos are corrected

Scientific paper

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/T$_{1}$ 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.

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