Kekulé superconductivity and antiferromagnetism on the graphene lattice
J. P. L. Faye, M. N. Diarra, D. Sénéchal
DOI 10.1103/PhysRevB.93.155149 · 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
We investigate superconducting order in the extended Hubbard model on the two-dimensional graphene lattice using the variational cluster approximation with an exact diagonalization solver at zero temperature. Building on the results of Faye et al. [Phys. Rev. B 92, 085121 (2015)], which identified triplet p- and (p+ip)-wave superconductivity as the most favored pairing symmetries in that model, we place uniform superconducting solutions in competition with a nonuniform Kekulé (p+ip-K) superconducting pattern, similar to those proposed by Roy and Herbut [Phys. Rev. B 82, 035429 (2010)]. We find that the p+ip-K solution is in fact the most favored pairing in most of the phase diagrams. In addition, we show that antiferromagnetism can coexist with the p+ip-K state and that both orders are enhanced by their coexistence.
Similar papers
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
Superconductivity in monolayer and few-layer graphene. I. Review of possible pairing symmetries and basic electronic properties
similarity 0.88Emile Pangburn et al.
Source status unknown — claims are unverified
Superconductivity and antiferromagnetism for an extended Hubbard Hamiltonian: Role of correlated hopping in a single-band model
similarity 0.88G. A. Lara & G. G. Cabrera
Source status unknown — claims are unverified
Superconductivity and antiferromagnetism in the two-dimensional Hubbard model: A variational study
similarity 0.88D. Eichenberger & D. Baeriswyl
Source status unknown — claims are unverified
Antiferromagnetic to superconducting phase transition in the hole- and electron-doped Hubbard model at zero temperature
similarity 0.88M. Aichhorn et al.
Source status unknown — claims are unverified
Exploring high-temperature superconductivity in the extended Hubbard model with antiferromagnetic tendencies
similarity 0.88Zhipeng Sun & Hai-Qing Lin
Source status unknown — claims are unverified