“Spectroscopy of the Fractal Hofstadter Energy Spectrum” 

Kevin P. Nuckolls*, Michael G. Scheer*, Dillon Wong*, Myungchul Oh*, Ryan L. Lee, Jonah Herzog-Arbeitman, Kenji Watanabe, Takashi Taniguchi, Biao Lian, and Ali Yazdani

Nature 639, 60–66 (2025)