Helical multilayer graphene relaxes into supermoiré domains whose effective Hamiltonians partition the low-energy spectrum into folded Dirac sectors with domain-dependent and gate-tunable valley topology.
In this approach, the real-space TB Hamiltonian is projected onto a momentum-space basis composed of atomic plane waves centered around a chosen valley,KorK ′
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Supermoir\'{e} domain-resolved effective Hamiltonians and valley topology in helical multilayer graphene
Helical multilayer graphene relaxes into supermoiré domains whose effective Hamiltonians partition the low-energy spectrum into folded Dirac sectors with domain-dependent and gate-tunable valley topology.