Yafis Barlas

Aug 10, 2023 | link.aps.org | Muhammad Imran |Paul Haney |Yafis Barlas

Mirror-symmetric twisted trilayer graphene (tTLG) is composed of even-parity twisted bilayer graphene (tBLG)-like bands and odd-parity Dirac-like bands. Here, we study the mirror-symmetric and mirror-asymmetric Hofstadter moiré (HM) fractal bands of tTLG. A quantum parity Hall state is identified in mirror-symmetric tTLG at experimentally accessible charge densities. This mirror-symmetry-protected topological phase exhibits simultaneous quantized Hall and longitudinal resistances.