Abstract

We use a random-phase approximation framework based on a Kohn-Luttinger-like mechanism to investigate superconductivity in heavily-doped single-layer graphene. Using ARPES-constrained tight-binding models for Tb-doped graphene and first-principles calculations for Li- and Cs-doped graphene, we assess the robustness of chiral d-wave superconductivity against dopant-induced band renormalization and lattice-symmetry changes. We predict that dopants which preserve the graphene lattice symmetry can support topological d + id superconductivity with critical temperatures up to 600 mK, whereas symmetry-changing dopants are detrimental to the d-wave state.

Abstract

We use a random-phase approximation framework based on a Kohn-Luttinger-like mechanism to investigate superconductivity in heavily-doped single-layer graphene. Using ARPES-constrained tight-binding models for Tb-doped graphene and first-principles calculations for Li- and Cs-doped graphene, we assess the robustness of chiral d-wave superconductivity against dopant-induced band renormalization and lattice-symmetry changes. We predict that dopants which preserve the graphene lattice symmetry can support topological d + id superconductivity with critical temperatures up to 600 mK, whereas symmetry-changing dopants are detrimental to the d-wave state.

Abstract

We use a random-phase approximation framework based on a Kohn-Luttinger-like mechanism to investigate superconductivity in heavily-doped single-layer graphene. Using ARPES-constrained tight-binding models for Tb-doped graphene and first-principles calculations for Li- and Cs-doped graphene, we assess the robustness of chiral d-wave superconductivity against dopant-induced band renormalization and lattice-symmetry changes. We predict that dopants which preserve the graphene lattice symmetry can support topological d + id superconductivity with critical temperatures up to 600 mK, whereas symmetry-changing dopants are detrimental to the d-wave state.

Abstract

We use a random-phase approximation framework based on a Kohn-Luttinger-like mechanism to investigate superconductivity in heavily-doped single-layer graphene. Using ARPES-constrained tight-binding models for Tb-doped graphene and first-principles calculations for Li- and Cs-doped graphene, we assess the robustness of chiral d-wave superconductivity against dopant-induced band renormalization and lattice-symmetry changes. We predict that dopants which preserve the graphene lattice symmetry can support topological d + id superconductivity with critical temperatures up to 600 mK, whereas symmetry-changing dopants are detrimental to the d-wave state.