We propose magic-angle helical trilayer graphene (HTG), a helical structure featuring
identical rotation angles between three consecutive layers of graphene, as a unique and …

We present comprehensive theoretical studies on the lattice relaxation and the electronic
structures in general nonsymmetric twisted trilayer graphenes. By using an effective …

Topological flat moiré bands with nearly ideal quantum geometry have been identified in
homobilayer transition metal dichalcogenide moiré superlattices, and are thought to be …

We study trilayer graphene arranged in a staircase stacking configuration with equal
consecutive twist angle. On top of the moiré crystalline pattern, a supermoiré long …

Quantum geometry is a fundamental concept to characterize the local properties of quantum
states. It is recently demonstrated that saturating certain quantum geometric bounds allows a …

We consider a configuration of three stacked graphene monolayers with commensurate twist
angles θ 12/θ 23= p/q, where p and q are coprime integers with 0< p<| q| and q can be …

Helical twisted trilayer graphene exhibits zero-energy flat bands with large degeneracy in
the chiral limit. The flat bands emerge at a discrete set of magic twist angles and feature …

Theoretical and experimental studies have verified the existence of “magic angles” in twisted
bilayer graphene, where the rotation angle between layers gives rise to flat bands and …

We systematically explore the structural and electronic properties of twisted trilayer
graphene systems. In general, these systems are characterized by two twist angles θ 12 and …

Helical trilayer graphene (hTG) exhibits a supermoiré pattern with large domains centered
around stacking points ABA and BAB, where two well-separated low-energy bands appear …