Related Experiment Video
Updated: Jun 1, 2026

Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices
Published on: July 11, 2025
Electronic structure of superconducting KC8 and nonsuperconducting LiC6 graphite intercalation compounds: evidence
Z-H Pan1, J Camacho, M H Upton
1Condensed Matter Physics and Materials Science Department, Brookhaven National Lab, Upton, New York 11973, USA.
Abstract:
We have performed photoemission studies of the electronic structure in LiC(6) and KC(8), a nonsuperconducting and a superconducting graphite intercalation compound, respectively. We have found that the charge transfer from the intercalant layers to graphene layers is larger in KC(8) than in LiC(6), opposite of what might be expected from their chemical composition. We have also measured the strength of the electron-phonon interaction on the graphene-derived Fermi surface to carbon derived phonons in both materials and found that it follows a universal trend where the coupling strength and superconductivity monotonically increase with the filling of graphene π(*) states. This correlation suggests that both graphene-derived electrons and graphene-derived phonons are crucial for superconductivity in graphite intercalation compounds.
Related Concept Videos
Superconductor
Network Covalent Solids
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
Types Of Superconductors
Electron Configuration of Multielectron Atoms
Valence Bond Theory
Metallic Solids
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability. Many...

