Acoustic-phonon-mediated superconductivity in rhombohedral trilayer graphene

Abstract

Motivated by the observation of two distinct superconducting phases in the moiréless ABC-stacked rhombohedral trilayer graphene, we investigate the electron-acoustic-phonon coupling as a possible pairing mechanism. We predict the existence of superconductivity with the highest $T_c\sim 3$K near the Van Hove singularity. Away from the Van Hove singularity, $T_c$ remains finite in a wide range of doping. In our model, the $s$-wave spin-singlet and $f$-wave spin-triplet pairings yield the same $T_c$, while other pairing states have negligible $T_c$. Our theory provides a simple explanation for the two distinct superconducting phases in the experiment and suggests that superconductivity and other interaction-driven phases (e.g., ferromagnetism) can have different origins.

6+2 pages, 3+1 figures. Published version

References in corpus (7)

• Controlling electron-phonon interactions in graphene at ultra high carrier densities
• Tunable Phase Boundaries and Ultra-Strong Coupling Superconductivity in Mirror Symmetric Magic-Angle Trilayer Graphene
• Acoustic phonon scattering limited carrier mobility in 2D extrinsic graphene
• Electric field tunable unconventional superconductivity in alternating twist magic-angle trilayer graphene
• Band Structure of ABC-Stacked Graphene Trilayers
• Chirality-dependent phonon-limited resistivity in multiple layers of graphene
• Large Pauli Limit Violation and Reentrant Superconductivity in Magic-Angle Twisted Trilayer Graphene

Cited by in corpus (5)

• Proximity spin-orbit and exchange coupling in ABA and ABC trilayer graphene van der Waals heterostructures
• Optical conductivity as a probe of the interaction-driven metal in rhombohedral trilayer graphene
• Superconductivity from phonon-mediated retardation in a single-flavor metal
• Pair density wave in quarter metals from a repulsive fermionic interaction in graphene heterostructures: A renormalization group study
• Charge density waves and stripes in quarter metals of graphene heterostructures