Unconventional superconductivity on the triangular lattice Hubbard model
Kuang Shing Chen, Zi Yang Meng, Unjong Yu, Shuxiang Yang, Mark Jarrell, Juana Moreno
DOI 10.1103/PhysRevB.88.041103 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Using large-scale dynamical cluster quantum Monte Carlo simulations, we explore the unconventional superconductivity in the hole-doped Hubbard model on the triangular lattice. Due to the interplay of electronic correlations, geometric frustration, and Fermi surface topology, we find a doubly degenerate singlet pairing state at an interaction strength close to the bare bandwidth. Such an unconventional superconducting state is mediated by antiferromagnetic spin fluctuations along the Γ-K direction, where the Fermi surface is nested. An exact decomposition of the irreducible particle-particle vertex further confirms the dominant component of the effective pairing interaction comes from the spin channel. Our findings suggest the existence of chiral d+id superconductivity in a hole-doped Hubbard triangular lattice in a strongly correlated regime, and provide insight into the superconducting phases of the water-intercalated sodium cobaltates NaxCoO2·yH2O, as well as the organic compounds κ-(ET)2X and Pd(dmit)2.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NaxCoO2·yH2O Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5 | Pressure not reported | unknown |
Similar papers
Coexistence of antiferromagnetism and topological superconductivity on the honeycomb lattice Hubbard model
similarity 0.90Yang Qi et al.
Source status unknown — claims are unverified
Universal approach to p-wave triplet superconductivity in the Hubbard models
similarity 0.90Wanpeng Han et al. · 2023 · arXiv:2303.04004
Source status unknown — claims are unverified
Superconductivity in the two-dimensional Hubbard model with cellular dynamical mean-field theory: A quantum impurity model analysis
similarity 0.90C. Walsh et al.
Source status unknown — claims are unverified
Binding of holes and competing spin-charge order in simple and extended Hubbard model on cylindrical lattice: An exact diagonalization study
similarity 0.90Md Fahad Equbal & M. A. H. Ahsan · 2025 · arXiv:2512.10577
Source status unknown — claims are unverified
A DMRG Study of Superconductivity in the Triangular Lattice Hubbard Model
similarity 0.90Jordan Venderley & E. A. Kim · 2019 · arXiv:1901.11034
Source status unknown — claims are unverified
Competition between d-wave superconductivity and antiferromagnetism in the two-dimensional Hubbard model
similarity 0.89M. Capone & G. Kotliar
Source status unknown — claims are unverified