Electronic spectrum and superconductivity in the $t$-$J$ model on the honeycomb lattice

Abstract

A microscopic theory of electronic spectrum and superconductivity within the $t$-$J$ model on the honeycomb lattice is formulated. The Dyson equation for the normal and anomalous Green functions for the two-band model in terms of the Hubbard operators is derived by applying the Mori-type projection technique. The self-energy is evaluated in the self-consistent Born approximation for electron scattering on spin and charge fluctuations induced by the kinematical interaction for the Hubbard operators. Superconducting pairing mediated by the antiferromagnetic exchange and spin fluctuations is discussed.

11 pages, 2 figures. arXiv admin note: text overlap with arXiv:1803.03140

References in corpus (5)

• The electronic properties of graphene
• Density waves and Cooper pairing on the honeycomb lattice
• On the theory of superconductivity in the extended Hubbard model: Spin-fluctuation pairing
• Competing pairing channels in the doped honeycomb lattice Hubbard model
• Spin excitations and thermodynamics of the antiferromagnetic Heisenberg model on the layered honeycomb lattice