2016/07/01 by Long-Yun Xiao, Shun-Li Yu, Wei Wang +4 · 1 citation
Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Honeycomb #Lattice (music) #Materials science #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Singlet state #Superconductivity #Superconductivity in MgB2 and Alloys #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1209/0295-5075/115/27008
published as EPL 115, 27008 (2016) · 6 pages, 4 figures
openalex publication_date 2016/07/01 · arxiv created 2016/08/30 · arxiv updated 2016/08/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We study the possible superconducting pairing symmetry mediated by spin and charge fluctuations on the honeycomb lattice using the extended Hubbard model and the random-phase-approximation method. From 2% to 20% doping levels, a spin-singlet -wave is shown to be the leading superconducting pairing symmetry when only the on-site Coulomb interaction U is considered, with the gap function being a mixture of the nearest-neighbor and next-nearest-neighbor pairings. When the offset of the energy level between the two sublattices exceeds a critical value, the most favorable pairing is a spin-triplet f -wave which is mainly composed of the next-nearest-neighbor pairing. We show that the next-nearest-neighbor Coulomb interaction V is also in favor of the spin-triplet f -wave pairing.