2025/07/16 by Le Zhang, Wenqiang Zhou, Zhang, Le +14 · 1 citation
Chemistry · Materials Science · Physics and Astronomy · #Advanced Physical and Chemical Molecular Interactions #Antiferromagnetism #Diagram #Dirac fermion #Electron #Graphene #Graphene research and applications #Heterojunction #Phase (matter) #Phase diagram #Quantum #Quantum and electron transport phenomena #Quantum phase transition #Quasiparticle #Semimetal #Superlattice #Topological Materials and Phenomena #Work (physics)
paper · pdf · doi:10.1103/zzks-vkl2
published in Physical Review Letters 137(4) (American Physical Society)
openalex publication_date 2026/06/18 · openalex created_date 2026/06/19 · openalex updated_date 2026/07/22
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 quantum critical point, we observe effective mass divergence and Fermi surface reconstruction. This highly tunable platform offers unprecedented control over heavy fermion physics, establishing moire heterostructures as a versatile arena for exploring correlated quantum phases-including potential unconventional superconductivity-in two-dimensional limit.