Tootfinder

Experimental evidence of the topological obstruction in twisted bilayer graphene
F. Mesple, P. Mallet, C. Dutreix, G. Lapertot, J-Y. Veuillen, V. T. Renard
https://arxiv.org/abs/2506.08913

Experimental evidence of the topological obstruction in twisted bilayer graphene
The rich physics of magic angle twisted bilayer graphene (TBG) results from the Coulomb interactions of electrons in flat bands of non-trivial topology. While the bands' dispersion is well characterized, accessing their topology remains an experimental challenge. Recent measurements established the local density of states (LDOS) as a topological observable. Here, we use scanning tunnelling microscopy to investigate the LDOS of TBG near a defect. We observe characteristic patterns resulting from…