Research paperTheoreticalPerturbative renormalization group approach to magic-angle twisted bilayer graphene using topological heavy fermion modelYi Huang, Yang-Zhi Chou, Sankar Das SarmaarXiv·2026·10.1126/science.abc2836·arXiv:2507.17751AbstractWe develop a perturbative renormalization group theory for the topological heavy fermion model describing magic-angle twisted bilayer graphene as an emergent Anderson lattice. The analysis tracks the flow of single-particle parameters and Coulomb interactions in an intermediate-coupling regime relevant to MATBG, showing that the RG flow lowers U/gamma and drives the system toward the chiral limit. The framework is proposed as a low-energy effective description for MATBG and related moiré and flat-band systems.Read more
Research paperTheoreticalPerturbative renormalization group approach to magic-angle twisted bilayer graphene using topological heavy fermion modelYi Huang, Yang-Zhi Chou, Sankar Das SarmaarXiv·2026·10.1126/science.abc2836·arXiv:2507.17751AbstractWe develop a perturbative renormalization group theory for the topological heavy fermion model describing magic-angle twisted bilayer graphene as an emergent Anderson lattice. The analysis tracks the flow of single-particle parameters and Coulomb interactions in an intermediate-coupling regime relevant to MATBG, showing that the RG flow lowers U/gamma and drives the system toward the chiral limit. The framework is proposed as a low-energy effective description for MATBG and related moiré and flat-band systems.Read more
Research paperTheoreticalPerturbative renormalization group approach to magic-angle twisted bilayer graphene using topological heavy fermion modelYi Huang, Yang-Zhi Chou, Sankar Das SarmaarXiv·2026·10.1126/science.abc2836·arXiv:2507.17751AbstractWe develop a perturbative renormalization group theory for the topological heavy fermion model describing magic-angle twisted bilayer graphene as an emergent Anderson lattice. The analysis tracks the flow of single-particle parameters and Coulomb interactions in an intermediate-coupling regime relevant to MATBG, showing that the RG flow lowers U/gamma and drives the system toward the chiral limit. The framework is proposed as a low-energy effective description for MATBG and related moiré and flat-band systems.Read more
Research paperTheoreticalPerturbative renormalization group approach to magic-angle twisted bilayer graphene using topological heavy fermion modelYi Huang, Yang-Zhi Chou, Sankar Das SarmaarXiv·2026·10.1126/science.abc2836·arXiv:2507.17751AbstractWe develop a perturbative renormalization group theory for the topological heavy fermion model describing magic-angle twisted bilayer graphene as an emergent Anderson lattice. The analysis tracks the flow of single-particle parameters and Coulomb interactions in an intermediate-coupling regime relevant to MATBG, showing that the RG flow lowers U/gamma and drives the system toward the chiral limit. The framework is proposed as a low-energy effective description for MATBG and related moiré and flat-band systems.Read more
