Presentation Information
[3F18]Intercalation-driven van Hove singularity and superconductivity in graphene
*Satoru Ichinokura1 (1. Tokyo Institute of Technology)
Graphene-based superconductors offer significant potential due to their unique properties. This study explores the correlation between van Hove singularity (VHS) and superconductivity in intercalated bilayer graphene. Using a multi-probe system, we found that in calcium-intercalated bilayer graphene, an epitaxial calcium layer forms at the graphene-SiC interface, enhancing the superconducting transition temperature (Tc) via VHS. Additionally, in lithium-intercalated bilayer graphene, the VHS is located at the Fermi level, with the Fermi level shifting as the number of graphene layers increases, implying various electronic ground states. These findings open pathways for low-cost, high-performance quantum devices.