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Charge-order and broken rotational symmetry in magic angle twisted bilayer graphene


The discovery of correlated electronic phases, including Mott-like insulators and superconductivity, in twisted bilayer graphene near the magic angle1–4, and the intriguing similarity of their phenomenology to that of the high-temperature superconductors, has spurred a surge of research to uncover the underlying physical mechanism5–9. Local spectroscopy, which is capable of accessing the symmetry and spatial distribution of the spectral function, can provide essential clues towards unravelling this puzzle. Here we use scanning tunnelling microscopy and spectroscopy in magic-angle twisted bilayer graphene to visualize the local density of states and charge distribution. Doping the sample to partially fill the flat band, where low-temperature transport measurements revealed the emergence of correlated electronic phases, we find a pseudogap phase accompanied by a global stripe charge order whose similarity to high-temperature superconductors10–16 provides evidence of a deeper link underlying the phenomenology of these systems.

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Correspondence to Jinhai Mao or Eva Y. Andrei.

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