Related Experiment Video
Updated: Aug 11, 2026

Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices
Published on: July 11, 2025
Heavy-Fermion Phase Diagram in Magic-Angle Twisted Trilayer Graphene
Le Zhang1,2, Wenqiang Zhou1, Xinjie Fang1
1Westlake University, Key Laboratory for Quantum Materials of Zhejiang Province, Department of Physics, School of Science, Hangzhou, China.
None:
The interplay between localized magnetic moments and itinerant electrons gives rise to exotic quantum states in condensed matter systems. Here, we demonstrate an electrically tunable heavy fermion phase diagram in magic-angle twisted trilayer graphene, achieved by controlling the Kondo hybridization between localized flat-band electrons and itinerant Dirac electrons via a displacement field. Our results reveal a continuous quantum phase transition from an antiferromagnetic semimetal to a paramagnetic heavy fermion metal. At the quantum critical point, we observe effective mass divergence and Fermi surface reconstruction. This highly tunable platform offers unprecedented control over heavy fermion physics, establishing moiré heterostructures as a versatile arena for exploring correlated quantum phases-including potential unconventional superconductivity-in the two-dimensional limit.
Related Concept Videos
Phase Diagram
Phase Diagram
Phase Diagrams of Ternary Systems
Phase Diagrams
Valence Bond Theory
Fermi Level
At absolute zero temperature, electrons fill all energy states up to the Fermi level, leaving upper states empty. As the temperature rises,...
