Possible three-dimensional superconducting properties of strongly correlated honeycomb compound In3Cu2VO9

National Conference on Theory of Magnetism

Jia, Shi-Qing^1 ; Wang, Qing-Wei^2 ; Liu, Jing^2 ; Zou, Liang-Jian^2

School of Physics and Materials Science, Anhui University, Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei

230039, China^1

Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei

230031, China^2

关键词: Doping concentration;    Finite temperatures;    Honeycomb lattices;    Inter-layer couplings;    Low-energy physics;    Pairing symmetries;    Superconducting phase;    Superconducting properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/827/1/012010/pdf
DOI  :  10.1088/1742-6596/827/1/012010

来源: IOP

【 摘 要 】

We present the zero- and finite-temperature superconducting properties of a modified t - J Jcmodel 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 In3Cu2VO9supports a dx2-y2+idxypairing 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.