Julien Barrier

Abstract The electronic quality of two-dimensional systems is crucial when exploring quantum transport phenomena. In semiconductor heterostructures, decades of optimization have yielded record-quality two-dimensional gases with transport and quantum mobilities reaching close to 108 and 106 cm2 V−1 s−1, respectively1,2,3,4,5,6,7,8,9,10. Although the quality of graphene devices has also been improving, it remains comparatively lower11,12,13,14,15,16,17.

Correction to: Nature Materials https://doi.org/10.1038/s41563-025-02180-3, published online 24 March 2025. In the version of this article initially published, there was an error in the Acknowledgements for Pablo Jarillo-Herrero, which has now been amended to read “P.J.-H. acknowledges funding for his sabbatical by CEX2019-000910-S [MCIN/AEI/10.13039/501100011033] Fundacio Cellex, Fundacio Mir-Puig, and Generalitat de Catalunya through CERCA” in the HTML and PDF versions of the article.

Abstract Moiré materials represent strongly interacting electron systems bridging topological and correlated physics. Despite notable advances, decoding wavefunction properties underlying the quantum geometry remains challenging. Here we utilize polarization-resolved photocurrent measurements to probe magic-angle twisted bilayer graphene, leveraging its sensitivity to the Berry connection that encompasses quantum ‘textures’ of electron wavefunctions.