Heavily doped graphene excels in electrical and thermal transport, far outperforming most other two-dimensional (2D) metals. Goldene, a single-atom-thick 2D metal with hexagonal lattice, has been demonstrated to possess conductivity rivaling that of heavily doped graphene. The recent synthesis of bilayer and trilayer goldene with two stacking orders provides a platform for exploring highly conductive 2D materials. Here, we investigate the electron-phonon scattering-limited electronic transport properties of these multilayer goldenes using first-principles calculations. Results show that multilayer goldenes possess significantly higher electrical and thermal conductivities than both monolayer goldene and heavily doped graphene at room temperature. A Lifshitz transition induced by hole doping or tensile strain can further enhance trilayer performance beyond the bilayer. These findings suggest that multilayer goldenes are promising candidates as conducting wires in future devices and integrated circuits, replacing bulk gold to enable miniaturization and reduce noble metal consumption.

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• Electrical conductivity
• Electron thermal conductivity
• Electron-phonon coupling
• 2-dimensional systems
• Monolayer films
• van der Waals systems
• Boltzmann theory
• Density functional calculations