Abstract
We present the zero- and finite-temperature superconducting properties of a modified t − J − Jc model on three-dimensional honeycomb lattice by employing the strongly correlated Slave Boson mean-field theory, focusing on the low energy physics in In3Cu2VO9. We find that the highest superconducting transition temperature Tc ≈ 4 K occurs at doping hole concentration δ = 0.03. The superconducting phase disappears at doping concentration of δ = 0.06. The superconducting ground state in doped In3Cu2VO9 supports a dx2−y2 + idxy pairing symmetry when the interlayer coupling Jc increases from 1.2 to 5.2 meV. Our theoretical results suggest that doped In3Cu2VO9 is a possible superconducting honeycomb system.
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