Spectroscopic signatures of many-body correlations in magic-angle twisted bilayer graphene

The discovery of superconducting and insulating states in magic-angle twisted bilayer graphene (MATBG)^1,2 has ignited considerable interest in understanding the nature of electronic interactions in this chemically pristine material. The transport properties of MATBG as a function of doping are similar to those of high-transition-temperature copper oxides and other unconventional superconductors_^1-3, which suggests that MATBG may be a highly interacting system. However, there is no direct experimental evidence of strong many-body correlations in MATBG. In this talk, I will present the unusual spectroscopic characteristics found on MATBG, obtained using a scanning tunneling microscope, and describe how these correlated features allow us to establish a more concrete connection between MATBG and high-Tc cuprates beyond the phenomenological resemblance of their transport phase diagrams⁴.

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